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A090866 Primes p == 1 (mod 4) such that (p-1)/4 is prime. +0
4
13, 29, 53, 149, 173, 269, 293, 317, 389, 509, 557, 653, 773, 797, 1109, 1229, 1493, 1637, 1733, 1949, 1997, 2309, 2477, 2693, 2837, 2909, 2957, 3413, 3533, 3677, 3989, 4133, 4157, 4253, 4349, 4373, 4493, 4517, 5189, 5309, 5693, 5717, 5813, 6173, 6197 (list; graph; listen)
OFFSET

1,1

FORMULA

a(n)=4*A023212(n)+1

CROSSREFS

Cf. A005385.

Sequence in context: A166034 A010337 A162579 this_sequence A098062 A094481 A045637

Adjacent sequences: A090863 A090864 A090865 this_sequence A090867 A090868 A090869

KEYWORD

nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 12 2004

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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