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A051645 Primes p such that 30*p+1 is also prime. 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; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

EXAMPLE

A002110(3)*p+1 and p are primes.

p=19 is in the sequence because also 30*p+1=571 is prime.

MATHEMATICA

Select[Prime[Range[900]], PrimeQ[30 # + 1] &] (* Vincenzo Librandi, Apr 11 2013 *)

PROG

(MAGMA) [p: p in PrimesUpTo(900) | IsPrime(30*p+1)]; // Vincenzo Librandi, Apr 11 2013

CROSSREFS

Cf. A005384, A005385, A007693, A002110.

Sequence in context: A179273 A251964 A045351 * A116635 A252280 A184774

Adjacent sequences:  A051642 A051643 A051644 * A051646 A051647 A051648

KEYWORD

nonn,easy

AUTHOR

Labos Elemer

STATUS

approved

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Last modified November 14 12:38 EST 2019. Contains 329114 sequences. (Running on oeis4.)