# Sequence

A sequence is a list of numbers which are related to each other.

Here is a sequence of sequins. A list for you to peruse.

There are many well known sequences you should recognise.

**Example 1**

Even number sequence

2, 4, 6, 8, 10, 12 ........

**Example 2**

Odd number sequence

1, 3, 5, 7, 9, 11 ..........

**Example 3**

A sequence of square numbers (or power of 2 or indices of 2).

1, 4, 9, 16, 25, 36 ......

**Example 4**

A sequence of cube numbers

`2times2times2=8`

`3times3times3=27`

`4times4times4=64`

8, 27, 64, 125 ...............

**Example 5**

A sequence of power of 10 (or indices of 10).

`10^1` | `=` | `10` | ||

`10^2` | `=` | `10times10` | `=` | `100` |

`10^3` | `=` | `10times10times10` | `=` | `1000` |

`10^4` | `=` | `10times10times10times10` | `=` | `10,000` |

10, 100, 1000, 10,000 ..........

**NOTE:**

These are all multiples of 10.

**Example 6**

Sequence of triangular numbers.

1, 3, 6, 10, 15 ..............