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Search: id:A129540
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| A129540 |
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Triangular numbers T such that T+10 is the next prime after T. |
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+0
1
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| 1711, 1891, 4851, 9591, 18721, 23653, 24753, 27261, 32131, 35511, 57291, 64261, 69751, 77421, 79401, 81003, 102831, 106491, 108811, 114003, 115921, 147153, 153181, 155403, 171991, 178503, 181503, 191271, 200661, 208981, 219453
(list; graph; listen)
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OFFSET
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1,1
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MAPLE
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a := proc (n) if nextprime((1/2)*n*(n+1)) = 10+(1/2)*n*(n+1) then (1/2)*n*(n+1) else end if end proc: seq(a(n), n = 1 .. 700); - Emeric Deutsch (deutsch(AT)duke.poly.edu), Jun 20 2007
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CROSSREFS
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Cf. A000217, A129755.
Adjacent sequences: A129537 A129538 A129539 this_sequence A129541 A129542 A129543
Sequence in context: A091368 A029559 A062916 this_sequence A008744 A024408 A140910
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KEYWORD
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nonn
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AUTHOR
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Zak Seidov (zakseidov(AT)yahoo.com), May 29 2007
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EXTENSIONS
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More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Jun 20 2007
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