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Search: id:A128141
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| 1, 2, 2, 3, 5, 3, 4, 9, 8, 4, 5, 14, 15, 11, 5, 6, 20, 24, 21, 14, 6, 7, 27, 35, 34, 27, 17, 7, 8, 35, 48, 50, 44, 33, 20, 8, 9, 44, 63, 69, 65, 54, 39, 23, 9, 10, 54, 80, 91, 90, 80, 64, 45, 26, 10
(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 = A006522 starting (1, 4, 11, 25, 50, 91,...). A128142 = A128132 * A122432
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FORMULA
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Unsigned A122432 * A128132 as infinite lower triangular matrices; where unsigned A122432 = (1; 3, 1; 6, 3, 1;...)
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EXAMPLE
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First few rows of the triangle are:
1;
2, 2;
3, 5, 3;
4, 9, 8, 4;
5, 14, 15, 11, 5;
6, 20, 24, 21, 14, 6;
7, 27, 35, 34, 27, 17, 7;
...
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CROSSREFS
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Cf. A122432, A128132, A006522, A128142, A006325.
Adjacent sequences: A128138 A128139 A128140 this_sequence A128142 A128143 A128144
Sequence in context: A061177 A129312 A115262 this_sequence A014430 A124727 A125101
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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), Feb 16 2007
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