Trying to define a way to generate the terms of a sequence, and starting with the number 5, I found, surprisingly, that the way I used generated this sequence:

5, 8, 11, 5, 8, 11, 5, 8, 11, ...

And these 3 numbers repeat in this order indefinitely.

Define a simple way to generate this sequence.

a(n)=5+3*(n-1)-9*int((n-1)/3)

check it - it works

Posted by Ady TZIDON on 2009-03-07 16:50:19