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Search: id:A134545
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| 1, 3, 1, 4, 2, 1, 7, 4, 2, 1, 6, 4, 3, 2, 1, 12, 8, 5, 3, 2, 1, 8, 6, 5, 4, 3, 2, 1, 15, 11, 8, 6, 4, 3, 2, 1, 13, 10, 8, 6, 5, 4, 3, 2, 1, 18, 14, 11, 9, 7, 5, 4, 3, 2, 1
(list; table; graph; listen)
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OFFSET
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1,2
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COMMENT
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Row sums = A007437: (1, 4, 7, 14, 16, 31,...). Left border = sigma(n), A000203: (1, 3, 4, 7, 6, 12,...).
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FORMULA
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A051731 * A004736 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
3, 1;
4, 2, 1;
7, 4, 2, 1;
6, 4, 3, 2, 1;
12, 8, 5, 3, 2, 1;
8, 6, 5, 4, 3, 2, 1;
15, 11, 8, 6, 4, 3, 2, 1;
...
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CROSSREFS
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Cf. A051731, A004736, A007436, A000203.
Adjacent sequences: A134542 A134543 A134544 this_sequence A134546 A134547 A134548
Sequence in context: A020851 A131033 A135821 this_sequence A135822 A116537 A048225
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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), Oct 31 2007
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