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# What is the sequence 1, 1, 2, 3, 5, 8, 15, 21 known as?

Question #124873. Asked by BIG_Flicker. (Jan 25 12 7:23 PM)

gtho4

the Fibonacci series

http://www.maths.surrey.ac.uk/hosted-sites/R.Knott/Fibonacci/fibtable.html

 Jan 25 12, 7:27 PM
tazman6619

I believe the sequence you are referring to would be 0, 1, 1, 2, 3, 5, 8, 13, 21. This is known as the Fibonacci number. It is arrived at by adding the first two numbers to the left of the third number to get the third number and so on throughout the sequence. 0+1=1, 1+1=2, 1+2=3 and so on.

http://en.wikipedia.org/wiki/Fibonacci_number

 Jan 25 12, 7:30 PM

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