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Search: id:A065130
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| A065130 |
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The difference between the sequence and first differences include all numbers (A005228) and the n-th triangular numbers (A000217). |
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+0
1
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| 0, 0, 1, 2, 3, 5, 7, 9, 11, 14, 17, 20, 23, 26, 30, 34, 38, 42, 46, 50, 54, 59, 64, 69, 74, 79, 84, 89, 94, 100, 106, 112, 118, 124, 130, 136, 142, 148, 155, 162, 169, 176, 183, 190, 197, 204, 211, 218, 226, 234, 242, 250, 258, 266, 274, 282
(list; graph; listen)
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OFFSET
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1,4
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MATHEMATICA
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a = {1}; d = 2; k = 1; Do[ While[ Position[a, d] != {}, d++ ]; k = k + d; d++; a = Append[a, k], {n, 1, 55} ]; b = Table[ n(n + 1)/2, {n, 1, 56} ]; a-b
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CROSSREFS
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Sequence in context: A102422 A062427 A127721 this_sequence A023535 A056834 A139282
Adjacent sequences: A065127 A065128 A065129 this_sequence A065131 A065132 A065133
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KEYWORD
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easy,nonn,obsc
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Nov 14 2001
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