# Sequence and recognising patterns simple n^(th) term

There are certain sequences or patterns you should know the n^(th) term of.

Even numbers 2, 4, 6, 8, 10, 12................n^(th)\ \ term=2n

To learn this section - go to "Sequence pattern 1"

Odd numbers 1, 3, 5, 7, 9, 11 ................. n^(th)\ \ term=2n-1

To learn this section - go to "Sequence pattern 1"

Square numbers 1, 4, 9, 16, 25, 36 ..........(..................................) n^(th)\ \ term=n^2

To learn this, see section - Quadratics and sequences.

Cube numbers and sequence.

 1 8 27 64 125 .......n^(th)\ \ term=n^3 (2xx2xx2) (3xx3xx3) (4xx4xx4) (5xx5xx5)

Triangular numbers 1, 3, 6, 10, 15 ........ n^(th)\ \ term=1/2n(n+1)

To learn this section, see triangles & sequences.

Prime numbers 2, 3, 5, 7, 11, 13  No known formula.

Fibonacci numbers 1, 1, 2, 3, 5, 8, 13 Add the two numbers before it.

(there is a formula but way above this level.)