OFFSET
1,1
COMMENTS
Also, primes p that divide A085606((p-1)/2) = ((p-1)/2-1)^((p-1)/2) - 1. Primes p such that p^2 divide A085606((p-1)/2) are listed in A157438.
Also, primes p>3 such -6 is a square modulo p. - Max Alekseyev, May 30 2009
Rational primes that decompose in the field Q(sqrt(-6)). - N. J. A. Sloane, Dec 25 2017
LINKS
MATHEMATICA
Select[Prime[Range[200]], JacobiSymbol[#, 6] == 1 &] (* T. D. Noe, Aug 17 2011 *)
Select[Prime[Range[200]], MemberQ[{1, 5, 7, 11}, Mod[#, 24]]&] (* Harvey P. Dale, May 25 2018 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Alexander Adamchuk, Mar 01 2009
EXTENSIONS
Extended by Max Alekseyev, May 30 2009
New name from Max Alekseyev, Jan 04 2018
STATUS
approved