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leopard
Nov27-08, 01:03 AM
10 10 11 12 15 16 21

Werg22
Nov27-08, 01:50 AM
22

?

leopard
Nov27-08, 02:23 AM
Why?

redargon
Nov27-08, 03:22 AM
22. because every second term in the sequence is seperated by 1. ie. 10 10 11 12 15 16 21
is seperated by 0, 1, 1, 3, 1, 5, 1, hence 22, my guess is that the number after that will be 27 and then 28, etc etc.