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Search: id:A057570
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| A057570 |
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Numbers of the form n*(7n+-1)/2. |
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+0
15
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| 0, 3, 4, 13, 15, 30, 33, 54, 58, 85, 90, 123, 129, 168, 175, 220, 228, 279, 288, 345, 355, 418, 429, 498, 510, 585, 598, 679, 693, 780, 795, 888, 904, 1003, 1020, 1125, 1143, 1254, 1273, 1390, 1410, 1533, 1554, 1683, 1705, 1840, 1863, 2004
(list; graph; listen)
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OFFSET
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1,2
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MATHEMATICA
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lst={}; s=0; Do[s+=n/7; If[Floor[s]==s, AppendTo[lst, s]], {n, 0, 7!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Jan 06 2009]
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CROSSREFS
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Cf. A074378, A001318, A057569, A154260, A154292, A154293 [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Jan 06 2009]
Sequence in context: A053910 A105074 A087884 this_sequence A024853 A023857 A026700
Adjacent sequences: A057567 A057568 A057569 this_sequence A057571 A057572 A057573
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Oct 04 2000
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