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A165350 Primes p such that [(p^2-1)/4]+p is not prime 1
2, 13, 23, 43, 53, 67, 71, 73, 79, 83, 97, 101, 103, 113, 137, 149, 157, 163, 167, 173, 179, 181, 193, 197, 211, 223, 233, 241, 257, 263, 269, 271, 277, 283, 293, 311, 313, 331, 349, 353, 373, 379, 383, 401, 409, 419, 421, 431, 433, 443, 457, 463, 467, 499 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

CROSSREFS

Cf. A163419, A163420

Sequence in context: A118796 A171794 A045389 * A195190 A090528 A094535

Adjacent sequences:  A165347 A165348 A165349 * A165351 A165352 A165353

KEYWORD

nonn

AUTHOR

Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Sep 16 2009

EXTENSIONS

Edited (but not checked) by N. J. A. Sloane, Sep 25 2009

The 2 added by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 18 2010

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Last modified February 16 13:12 EST 2012. Contains 205909 sequences.