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A159048
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Primes which are triangular numbers plus 4.
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2
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5, 7, 19, 59, 109, 157, 257, 439, 599, 907, 1039, 1229, 1279, 1489, 1657, 3407, 3659, 4099, 5569, 6907, 7507, 7879, 8389, 9049, 10589, 11329, 11939, 14369, 16657, 17209, 17959, 18149, 18919, 19507, 20507, 22159, 26339, 30139, 31379, 34457, 36319
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| 7=3+4, 19=15+4, 59=55+4, 109=105+4, 157=153+4, 257=253+4, ...
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MATHEMATICA
| s=0; lst={}; Do[s+=n; p=s+4; If[PrimeQ[p], AppendTo[lst, p]], {n, 0, 7!}]; lst
Select[Accumulate[Range[500]]+4, PrimeQ] (* From Harvey P. Dale, Apr 23 2011 *)
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CROSSREFS
| Cf. A000217, A055469, A055472, A159047
Sequence in context: A079361 A162268 A045447 * A171131 A096636 A101588
Adjacent sequences: A159045 A159046 A159047 * A159049 A159050 A159051
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KEYWORD
| nonn
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AUTHOR
| Vladimir Orlovsky (4vladimir(AT)gmail.com), Apr 03 2009
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EXTENSIONS
| Edited by N. J. A. Sloane, Apr 06 2009
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