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1, 2, 1, 2, 2, 1, 2, 3, 3, 1, 2, 4, 6, 4, 1, 2, 5, 10, 10, 5, 1, 2, 6, 15, 20, 15, 6, 1, 2, 7, 21, 35, 35, 21, 7, 1, 2, 8, 28, 56, 70, 56, 28, 8, 1, 2, 9, 36, 84, 126, 126, 84, 36, 9, 1
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Row sums = A083318: (1, 3, 5, 9, 17, 33,...).
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FORMULA
| A103451 * A007318 as infinite lower triangular matrices. Add (0, 1, 1, 1,...) to left column of A007318.
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EXAMPLE
| First few rows of the triangle are:
1;
2, 1;
2, 2, 1;
2, 3, 3, 1;
2, 4, 6, 4, 1;
2, 5, 10, 10, 5, 1;
...
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CROSSREFS
| Cf. A103451, A083318, A007318.
Sequence in context: A029315 A070080 A131400 * A140186 A078498 A178522
Adjacent sequences: A132746 A132747 A132748 * A132750 A132751 A132752
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KEYWORD
| nonn,tabl
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), Aug 28 2007
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