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A155838
Primes p such that p^2 divides A085606(2p-2) = (2p-3)^(2p-2) - 1.
0
2, 5, 13, 61681, 1235573, 27544452149
OFFSET
1,1
COMMENTS
For p>3, (2p-3)^(2p-2) - 1 is divisible by p.
Primes p such that 3^p == 3-2p (mod p^2).
No other terms below 10^11.
CROSSREFS
Cf. A085606.
Sequence in context: A128772 A272106 A190478 * A166405 A226505 A370235
KEYWORD
hard,more,nonn
AUTHOR
Alexander Adamchuk, Jan 28 2009
EXTENSIONS
27544452149 from Max Alekseyev, Oct 14 2009
STATUS
approved