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Search: id:A128308
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| 1, 1, 1, 2, 2, 1, 6, 4, 3, 1, 19, 10, 7, 4, 1, 59, 29, 17, 11, 5, 1, 180, 88, 46, 28, 16, 6, 1, 544, 268, 134, 74, 44, 22, 7, 1, 1637, 812, 402, 208, 118, 66, 29, 8, 1, 4917, 2449, 1214, 610, 326, 184, 95, 37, 9, 1
(list; table; graph; listen)
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OFFSET
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1,4
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COMMENT
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Row sums = A007051: (1, 2, 5, 14, 41, 122,...).
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FORMULA
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A007318 * A128307 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
1, 1;
2, 2, 1;
6, 4, 3, 1;
19, 10, 7, 4, 1;
59, 29, 17, 11, 5, 1;
...
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CROSSREFS
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Cf. A007051, A128307, A007318.
Sequence in context: A129100 A127082 A065052 this_sequence A109152 A130469 A106381
Adjacent sequences: A128305 A128306 A128307 this_sequence A128309 A128310 A128311
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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), Feb 25 2007
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