A195987 Primes p=6k+1 such that p^2 | n^n+(n+1)^(n+1) for some n=4 (mod 6) but not p | n^2+n+1.

907, 1039, 1093, 1231, 1303, 1531, 1993, 2377, 2647, 2713, 2731, 3001, 3331, 4003, 4177, 4243, 4339, 4447

Offset

1,1

Links

Table of n, a(n) for n=1..18.

D. Broadhurst, Re: Square factors of n^n+(n+1)^(n+1) [starting with 907^2], on yahoo group "primenumbers", Oct 12 2011

David Broadhurst and others, Square factors of n^n+(n+1)^(n+1) [starting with 907^2], digest of 81 messages in primenumbers Yahoo group, Oct 12 - Nov 29, 2011.

Crossrefs

Sequence in context: A006917 A174862 A350852 * A216468 A031939 A253228

Adjacent sequences: A195984 A195985 A195986 * A195988 A195989 A195990

Keyword

nonn,more

Author

M. F. Hasler, Oct 12 2011

Status

approved