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1, 5, 4, 12, 5, 7, 22, 6, 8, 10, 35, 7, 9, 11, 13, 51, 8, 10, 12, 14, 16, 70, 9, 11, 13, 15, 17, 19, 92, 10, 12, 14, 16, 18, 20, 22, 117, 11, 13, 15, 17, 19, 21, 23, 25, 145, 12, 14, 16, 18, 20, 22, 24, 26, 28
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Left column = pentagonal numbers, A000326: (1, 5, 12, 22,...). Row sums = A001106: (1, 9, 24, 46, 75, 111,...).
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FORMULA
| A000012 * A131844 as infinite lower triangular matrices.
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EXAMPLE
| First few rows of the triangle are:
1;
5, 4;
12, 5, 7;
22, 6, 8, 10;
35, 7, 9, 11, 13;
51, 8, 10, 12, 14, 16;
70, 9, 11, 13, 15, 17, 19;
92, 10, 12, 14, 16, 18, 20, 22;
...
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CROSSREFS
| Cf. A131844, A001106, A000326.
Sequence in context: A051552 A165367 A166549 * A095871 A189235 A019068
Adjacent sequences: A131872 A131873 A131874 * A131876 A131877 A131878
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KEYWORD
| nonn,tabl
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), Jul 22 2007
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