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Search: id:A074328
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| A074328 |
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Numbers n such that p(1+n^2)-p(n^2)=2, where p(j) is the j-th prime. |
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1
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| 7, 8, 9, 12, 15, 16, 22, 25, 27, 34, 53, 83, 85, 88, 95, 107, 108, 144, 149, 187, 196, 223, 234, 238, 249, 255, 268, 274, 315, 324, 350, 355, 358, 367, 386, 410, 411, 416, 424, 436, 440, 445, 450, 462, 469, 471, 481, 494, 501, 509, 511, 517, 522, 549, 554, 564
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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n=25 is here because 626-th and 625-th primes are twin: 4639-4637=2.
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MATHEMATICA
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t=Table[0, {250}]; t1=Table[0, {250}]; s=0; k=0; Do[s=Prime[1+n^2]-Prime[n^2]; If[s==2, k=k+1; t[[k]]=n; t1[[k]]=Prime[n^2]; Print[{k, n, Prime[n^2]}]], {n, 1, 2500}] t t1
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CROSSREFS
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Sequence in context: A030569 A138580 A045158 this_sequence A037369 A076599 A067197
Adjacent sequences: A074325 A074326 A074327 this_sequence A074329 A074330 A074331
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Aug 21 2002
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