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A122424 Primes p such that q=4p^2 + 1 and r=4q^2 + 1 are also primes. +0
1
3, 13, 47, 677, 983, 1013, 1163, 1373, 1567, 1877, 2003, 2333, 2477, 2753, 3463, 4057, 4423, 4993, 7253, 9833, 10993, 11383, 13907, 15413, 15607, 17317, 18517, 19867, 20123, 20533, 20693, 21937, 24517, 24967, 25633, 26293, 28547, 28867, 29063 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Cf. A052291 Primes p such that 4p^2 + 1 is also prime, A005574 Numbers n such that n^2 + 1 is prime.

Sequence in context: A017943 A089930 A084519 this_sequence A027326 A108946 A048482

Adjacent sequences: A122421 A122422 A122423 this_sequence A122425 A122426 A122427

KEYWORD

nonn

AUTHOR

Zak Seidov (zakseidov(AT)yahoo.com), Oct 20 2006

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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