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Search: id:A159047
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| A159047 |
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Primes which are triangular numbers plus 3. |
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+0
3
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| 3, 13, 31, 139, 193, 409, 499, 823, 1381, 1543, 2083, 2281, 3163, 3919, 6673, 7753, 9319, 9733, 17581, 19309, 21739, 22369, 24979, 27031, 27733, 30631, 39343, 40189, 51043, 53959, 54949, 57973, 62131, 67531, 70879, 81409, 85081, 86323, 91381
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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13=10+3, 31=28+3, 139=136+3, 193=190+3, 409=406+3, ...
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MATHEMATICA
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s=0; lst={}; Do[s+=n; p=s+3; If[PrimeQ[p], AppendTo[lst, p]], {n, 0, 7!}]; lst
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CROSSREFS
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Cf. A000217, A055469, A055472
Sequence in context: A034050 A107689 A154834 this_sequence A073337 A128067 A052493
Adjacent sequences: A159044 A159045 A159046 this_sequence A159048 A159049 A159050
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KEYWORD
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nonn
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AUTHOR
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Vladimir Orlovsky (4vladimir(AT)gmail.com), Apr 03 2009
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