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A051645 Primes p such that 30*p+1 is also prime. +0
2
2, 5, 7, 11, 19, 23, 41, 43, 61, 67, 71, 79, 89, 109, 113, 131, 137, 167, 181, 193, 223, 229, 233, 277, 281, 313, 317, 331, 337, 359, 383, 439, 443, 457, 461, 467, 491, 503, 509, 541, 547, 593, 599, 607, 641, 691, 701, 733, 739, 743, 751, 769, 797, 821, 823 (list; graph; listen)
OFFSET

1,1

FORMULA

A002110[3]*p+1 is prime

EXAMPLE

p=19 and 30p+1=571 are both primes

CROSSREFS

Cf. A005384, A005385, A007693, A002110.

Sequence in context: A152216 A045350 A045351 this_sequence A116635 A038884 A040122

Adjacent sequences: A051642 A051643 A051644 this_sequence A051646 A051647 A051648

KEYWORD

nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu)

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


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