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Search: id:A055472
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| A055472 |
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Primes of the form k(k+1)/2+2 (i.e. two more than a triangular number). |
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+0
5
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| 2, 3, 5, 17, 23, 47, 107, 173, 233, 353, 467, 563, 743, 863, 1277, 1433, 1487, 2213, 2417, 2777, 3083, 3323, 4007, 4373, 5153, 7877, 8387, 10733, 11177, 11783, 13043, 13697, 14537, 15053, 15227, 17207, 17393, 17957, 18917, 21323, 22157, 23873
(list; graph; listen)
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OFFSET
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1,1
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MAPLE
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P:=proc(n) local i, w; w:=2; for i from 0 by 1 to n do w:=w+i; if isprime(w) then print(w); fi; od; end: P(1000); - Paolo P. Lava (ppl(AT)spl.at), Apr 24 2007
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MATHEMATICA
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s=0; lst={}; Do[s+=n; p=s+2; If[PrimeQ[p], AppendTo[lst, p]], {n, 0, 6!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Apr 03 2009]
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CROSSREFS
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Cf. A000040, A000217, A022856.
Sequence in context: A121558 A089442 A106859 this_sequence A077499 A127061 A065725
Adjacent sequences: A055469 A055470 A055471 this_sequence A055473 A055474 A055475
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KEYWORD
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nonn
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AUTHOR
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Henry Bottomley (se16(AT)btinternet.com), Jun 27 2000
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