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A183529
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An Ulam-type sequence: a(n) = n if n<=6; for n>6, a(n) = least number > a(n-1) which is a unique sum of 6 distinct earlier terms.
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2
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1, 2, 3, 4, 5, 6, 21, 36, 37, 38, 39, 40, 41, 51, 61, 66, 284, 285, 289, 290, 297, 298, 299, 310, 312, 559, 561, 562, 570, 571, 574, 575, 834, 836, 837, 838, 839, 840, 841, 849, 850, 1109, 1124, 1125, 1126, 1127, 1386, 1401, 1402, 1661, 1676, 1677, 1936, 1951
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OFFSET
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1,2
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COMMENTS
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An Ulam-type sequence - see A002858 for further information.
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LINKS
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Alois P. Heinz, Table of n, a(n) for n = 1..700
Index entries for Ulam numbers
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EXAMPLE
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a(7) = 21 = 1 + ... + 6 = 6*7/2, because it is the least number >6 with a unique sum of 6 distinct earlier terms.
a(8) = 36 = 1 + ... + 5 + 21 = 6^2, because it is the least number >21 with a unique sum of 6 distinct earlier terms.
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MAPLE
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# see A183534 for programs.
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CROSSREFS
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Column k=6 of A183534. Cf. A002858, A007086, A183527-A183533, A135737.
Sequence in context: A123678 A208450 A037333 * A037404 A037440 A037332
Adjacent sequences: A183526 A183527 A183528 * A183530 A183531 A183532
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KEYWORD
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nonn
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AUTHOR
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Jonathan Vos Post, Alois P. Heinz, Jan 05 2011
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STATUS
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approved
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