# What are some famous number sequences?

## What are some famous number sequences?

Some Famous Sequences

• Recamán’s sequence, A005132.
• The Busy Beaver problem, A060843.
• The Catalan numbers, A000108.
• The prime numbers, A000040.
• The Mersenne primes, A000043 and A000668.
• The Fibonacci numbers, A000045.

### What are the special sequences of number patterns?

Special sequences

• Square numbers: 1, 4, 9, 16, 25, 36, … – the nth term is.
• Cube numbers: 1, 8, 27, 64, 125, – the nth term is .
• Triangular numbers: 1, 3, 6, 10, 15, (these numbers can be represented as a triangle of dots).
• Fibonacci sequence: 1, 1, 2, 3, 5, 8, 13.

#### Why is 70 a weird number?

Weird numbers are natural numbers that are abundant but not semiperfect. For example, 70 is the lowest weird number, because its set of proper divisors {1,2,5,7,10,14,35} sum to 74, but no subset of its set of proper divisors sum to the number 70, and 70 is the smallest number to meet such conditions.

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What is a famous sequence?

The Fibonacci sequence is one of the most famous formulas in mathematics. Each number in the sequence is the sum of the two numbers that precede it. So, the sequence goes: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, and so on.

What are Lucas sequences?

The Lucas numbers or Lucas series are an integer sequence named after the mathematician François Édouard Anatole Lucas (1842–91), who studied both that sequence and the closely related Fibonacci numbers. Lucas numbers and Fibonacci numbers form complementary instances of Lucas sequences.

## Which of the following would be a Fibonacci sequence?

The Fibonacci sequence is a series of numbers where a number is the addition of the last two numbers, starting with 0, and 1. The Fibonacci Sequence: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55…

### What is a sad number?

The numbers for which the process of summing up of the squares of its digits ends in 1 are happy numbers. On the other hand, numbers that don’t end in 1 are called unhappy or sad numbers. Here, the number 36 loops endlessly in a cycle which doesn’t end in 1. Therefore 36 is an unhappy or sad number.

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#### What is vampire number in Java?

A vampire number is a natural decimal number with an even number of digits, that can be factored into two integers. These two factors are called the fangs, and must have the following properties: they each contain half the number of the decimal digits of the original number.

What is the most common number sequence?

(1) Fibonacci Series: Probably the most famous of all Mathematical sequences; it goes like this—- 1,1,2,3,5,8,13,21,34,55,89… At first glance one may wonder what makes this sequence of numbers so sacrosanct or important or famous.

What are some examples of special number sequences?

There are also many special sequences, here are some of the most common: 1, 3, 6, 10, 15, 21, 28, 36, 45, This Triangular Number Sequence is generated from a pattern of dots that form a triangle. By adding another row of dots and counting all the dots we can find the next number of the sequence:

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## Why does the first list of numbers not make a sequence?

The first list of numbers does not make a sequence because the numbers lack proper order or pattern. The other list is a sequence because there is a proper order of obtaining the preceding number. The consecutive number is obtained by adding 3 to the preceding integer. Example 2

### How do you find the sequence pattern with 3 consecutive numbers?

Three consecutive numbers, 24, 28, and 32, are examined to find this sequence pattern, and the rule obtained. You can notice that the corresponding number is obtained by adding 4 to the preceding number. The missing terms are therefore: 8 + 4 = 12 and 16 + 4 = 20

#### How do you insert a unique sequence number in Excel?

Insert unique sequence number in Excel as 1, 2, 3,… Although there is not a command to insert sequence numbers in Excel, you can insert sequence numbers in contiguous cells with clicking and dragging mouse. Step 1: Enter 1 in a cell, and enter 2 in a cell beside the first cell.