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 A154998 Primes p such that p^2 divides A048861((p-1)/2). 1
 3, 2001907169 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS No other terms below 10^11. LINKS FORMULA 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). PROG (PARI) { forprime(p=3, 10^11, if(Mod((p-1)/2, p^2)^((p-1)/2)==1, print(p); )) } CROSSREFS Sequence in context: A081508 A067481 A058433 * A036236 A235357 A260002 Adjacent sequences:  A154995 A154996 A154997 * A154999 A155000 A155001 KEYWORD bref,hard,more,nonn AUTHOR Max Alekseyev, Jan 18 2009 EXTENSIONS Edited by Max Alekseyev, Oct 13 2009 STATUS approved

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Last modified April 18 15:02 EDT 2019. Contains 322209 sequences. (Running on oeis4.)