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Search: id:A131251
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| 1, 2, 1, 3, 3, 1, 4, 6, 3, 1, 5, 10, 7, 3, 1, 6, 15, 14, 7, 3, 1, 7, 21, 25, 15, 7, 3, 1, 8, 28, 41, 30, 15, 7, 3, 1, 9, 36, 63, 56, 31, 15, 7, 3, 1, 10, 45, 92, 98, 62, 31, 15, 7, 3, 1
(list; table; graph; listen)
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OFFSET
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0,2
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COMMENT
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Row sums = A001924: (1, 3, 7, 14, 26, 46, 79,...). A131252 = A052509 * A000012.
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FORMULA
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A000012 * A052509 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
2, 1;
3, 3, 1;
4, 6, 3, 1;
5, 10, 7, 3, 1;
6, 15, 14, 7, 3, 1;
7, 21, 25, 15, 7, 3, 1;
...
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CROSSREFS
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Cf. A052509, A000012, A001924, A131252.
Sequence in context: A090349 A093430 A074659 this_sequence A057145 A134394 A074909
Adjacent sequences: A131248 A131249 A131250 this_sequence A131252 A131253 A131254
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KEYWORD
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nonn,tabl
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Jun 23 2007
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