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 A064936 Primes p such that gcd(p, prime(p)^2 - 1) does not equal 1. 0
 2, 3, 5, 181, 40087, 251737 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS No further terms up to 41161739. - Harvey P. Dale, Dec 23 2011 LINKS EXAMPLE 5 belongs in the sequence because gcd(5, P_5^2 -1) = gcd(5, 120) = 5. MATHEMATICA Do[ If[ GCD[ Prime[n], Prime[ Prime[n]]^2 - 1] != 1, Print[ Prime[n]] ], {n, 1, 10^6} ] CROSSREFS Cf. A064830. Sequence in context: A325505 A319609 A140551 * A041655 A082520 A062597 Adjacent sequences:  A064933 A064934 A064935 * A064937 A064938 A064939 KEYWORD nonn,more AUTHOR Robert G. Wilson v, Oct 26 2001 STATUS approved

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Last modified May 9 21:52 EDT 2021. Contains 343746 sequences. (Running on oeis4.)