[seqfan] A081860 and A141419.

L. Edson Jeffery lejeffery2 at gmail.com
Fri Jan 11 16:02:49 CET 2013


It appears that A081860(n) - sum_{k=1..n} A141419(n,k)^2 > 0, if and only
if 2*n+1 is a prime. Is this true? Also, the differences are the sequence
{0,0,0,1,0,0,14,0,0,71,0,13,...}, so is there some pattern in the nonzero
terms?

Ed Jeffery

http://oeis.org/A081860
http://oeis.org/A141419


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