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Search: id:A159049
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A159049 Primes of the form (5+ a triangular number A000217). +0
1
5, 11, 41, 71, 83, 281, 383, 1181, 1601, 2351, 2633, 3491, 3833, 4283, 5783, 6221, 6791, 8783, 10301, 10883, 11633, 12251, 14033, 15581, 18341, 26111, 26801, 30881, 31883, 34721, 38231, 41333, 41621, 42491, 43961, 46061, 47591, 53633, 60383 (list; graph; listen)
OFFSET

1,1

EXAMPLE

11 is in the list because it is A000217(3)+5 and a prime. 41=36+5= A000217(8)+5 is a prime. 71=66+5=A000217(11)+5 is a prime.

MATHEMATICA

s=0; lst={}; Do[s+=n; p=s+5; If[PrimeQ[p], AppendTo[lst, p]], {n, 0, 7!}]; lst

CROSSREFS

Cf. A055469, A055472, A159047, A159048

Sequence in context: A089441 A046121 A023271 this_sequence A047976 A006382 A055113

Adjacent sequences: A159046 A159047 A159048 this_sequence A159050 A159051 A159052

KEYWORD

nonn,easy

AUTHOR

Vladimir Orlovsky (4vladimir(AT)gmail.com), Apr 03 2009

EXTENSIONS

Definition rephrased, R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 05 2009

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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