Fibonacci Sequence
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13, 21 - it is the Fibonacci sequence
13 3 2 21 1 1 8 5
This is called the Fibonacci sequence. The last two numbers in the sequence are added together to produce the next. Therefore, following 8 and 13 are: 8 + 13 = 21 13 + 21 = 34 21 + 34 = 55 34 + 55 = 89 55 + 89 = 144
1 5 9 13 17 21
It is: 1 1 2 3 5 8 13 and 21 which is the 8th term