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Search: id:A131375
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| 1, 2, 1, 1, 3, 1, 2, 3, 4, 1, 1, 6, 6, 5, 1, 2, 5, 13, 10, 6, 1, 1, 9, 15, 24, 15, 7, 1, 2, 7, 27, 35, 40, 21, 8, 1, 1, 12, 28, 66, 70, 62, 28, 9, 1, 2, 9, 46, 84, 141, 126, 91, 36, 10, 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 = A117591: (1, 3, 5, 10, 19, 37, 72,...).
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FORMULA
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A007318 + A046854 - A049310 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
2, 1;
1, 3, 1;
2, 3, 4, 1;
1, 6, 6, 5, 1;
2, 5, 13, 10, 6, 1;
1, 9, 15, 24, 15, 7, 1;
...
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CROSSREFS
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Cf. A046854, A007318, A049310, A117591.
Sequence in context: A123275 A112544 A134521 this_sequence A112798 A029288 A050117
Adjacent sequences: A131372 A131373 A131374 this_sequence A131376 A131377 A131378
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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), Jul 04 2007
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