%I A154998
%S A154998 3,2001907169
%N A154998 Primes p such that p^2 divides A048861((p-1)/2).
%C A154998 No other terms below 10^11.
%F A154998 Elements of A125854 congruent to 1 or 3 modulo 8, i.e., primes p such 
               that p == 1 or 3 (mod 8) and 2^(p-1) == 1+p (mod p^2).
%o A154998 (PARI) { forprime(p=3,10^11, if(Mod((p-1)/2,p^2)^((p-1)/2)==1, print(p);
               )) }
%Y A154998 A048861,A121999,A125854
%Y A154998 Sequence in context: A081508 A067481 A058433 this_sequence A036236 A058447 
               A058453
%Y A154998 Adjacent sequences: A154995 A154996 A154997 this_sequence A154999 A155000 
               A155001
%K A154998 bref,hard,more,nonn
%O A154998 1,1
%A A154998 Max Alekseyev (maxale(AT)gmail.com), Jan 18 2009
%E A154998 Edited by Max Alekseyev (maxale(AT)gmail.com), Oct 13 2009