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1, 3, 2, 6, 2, 3, 10, 2, 3, 4, 15, 2, 3, 4, 5, 21, 2, 3, 4, 5, 6, 28, 2, 3, 4, 5, 6, 7, 36, 2, 3, 4, 5, 6, 7, 8, 45, 2, 3, 4, 5, 6, 7, 8, 9, 55, 2, 3, 4, 5, 6, 7, 8, 9, 10
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Row sums = A028387
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FORMULA
| A000012 * A127648 * A103451 as infinite lower triangular matrices. Replace left border of 1's in A002260 with (1, 3, 6, 10, 15,...).
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EXAMPLE
| First few rows of the triangle are:
1;
3, 2;
6, 2, 3;
10, 2, 3, 4;
15, 2, 3, 4, 5;
...
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CROSSREFS
| Cf. A002260, A127648, A103451.
Sequence in context: A019761 A188614 A133519 * A143310 A131897 A061187
Adjacent sequences: A135220 A135221 A135222 * A135224 A135225 A135226
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KEYWORD
| nonn,tabl
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), Nov 23 2007
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