[seqfan] Re: A174397 and primes with negative value.

[N. J. A. Sloane]

Yes,  in the OEIS primes are positive.  I'm going to reject this sequence:

%I A174397
%S A174397 29,2,47,241,1181,4691,15307,24023,29401,42437,117043,226231,
%T A174397 273827,299941,703883,1441523,2246501,2569691,3441121,4328773,
%U A174397 5733173,6329387,8362973,10791191,12006223,13649033,14703167
%V A174397 29,2,-47,-241,-1181,-4691,-15307,-24023,-29401,-42437,-117043,-226231,
%W A174397 -273827,-299941,-703883,-1441523,-2246501,-2569691,-3441121,-4328773,
%X A174397 -5733173,-6329387,-8362973,-10791191,-12006223,-13649033,-14703167
%N A174397 Primes of the form p=(n+2)^3-(n+1)^3-n^3.
%Y A174397 Select[Table[(n+2)^3-(n+1)^3-n^3, {n, 6!}], PrimeQ[ # ]&]
%Y A174397 Adjacent sequences: A174394 A174395 A174396 this_sequence A174398 A174399 A174400
%K A174397 nonn,new
%O A174397 1,1
%A A174397 Vladimir Orlovsky (4vladimir(AT)gmail.com), Mar 18 2010


Neil