| 1, 2, 3, 5, 8, 13, 18, 24, 31, 39, 49, 59, 71, 83, 96, 110, 125, 141, 158, 176, 195, 215, 236, 258, 281, 305, 330, 356, 383, 411, 440, 470, 501, 533, 566, 600, 635, 671, 708, 746, 785, 825, 866, 908, 951, 995, 1040, 1086, 1133, 1181, 1230, 1280, 1331, 1383
(list; graph; listen)
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OFFSET
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1,2
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FORMULA
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For 13 <= n < 145, a(n) = (n^2 - 3n + 12)/2. For 145 <= n < 17975, a(n) = (n^2 - 3n + 14)/2. - David Wasserman (wasserma(AT)spawar.navy.mil), Oct 07 2004
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CROSSREFS
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Cf. A082827, A082828.
Sequence in context: A070217 A001149 A144117 this_sequence A120761 A045842 A088795
Adjacent sequences: A081609 A081610 A081611 this_sequence A081613 A081614 A081615
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KEYWORD
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base,easy,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 22 2003
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EXTENSIONS
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Corrected and extended by David Wasserman (wasserma(AT)spawar.navy.mil), Oct 07 2004
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