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Search: id:A127099
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| 1, 3, 2, 4, 0, 3, 7, 6, 0, 4, 6, 0, 0, 0, 5, 12, 8, 9, 0, 0, 6, 8, 0, 0, 0, 0, 0, 7, 15, 14, 0, 12, 0, 0, 0, 8, 13, 0, 12, 0, 0, 0, 0, 0, 9, 18, 12, 0, 0, 15, 0, 0, 0, 0, 10, 12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11, 28, 24, 21, 16, 0, 18, 0, 0, 0, 0, 0, 12, 14, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 13, 24, 16, 0, 0
(list; table; graph; listen)
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OFFSET
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1,2
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COMMENT
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Multiply the infinite lower triangular matrices A126988 and A127093.
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FORMULA
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T(n,m) = sum_{j=m..n} A126988(n,j)*A127093(j,m).
T(n,1) = A000203(n).
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EXAMPLE
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First few rows of the triangle are:
1;
3, 2;
4, 0, 3;
7, 6, 0, 4;
6, 0, 0, 0, 5;
12, 8, 9, 0, 0, 6;
8, 0, 0, 0, 0, 0, 7;
15, 14, 0, 12, 0, 0, 0, 8;
13, 0, 12, 0, 0, 0, 0, 0, 9;
18, 12, 0, 0, 15, 0, 0, 0, 0, 10;
...
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CROSSREFS
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Cf. A060640 (row sums), A000203, A127093, A127094, A127095, A127096, A127097, A127098, A127013, A127057.
Sequence in context: A070690 A160387 A129237 this_sequence A004545 A127481 A154879
Adjacent sequences: A127096 A127097 A127098 this_sequence A127100 A127101 A127102
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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), Jan 05 2007
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EXTENSIONS
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Extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 18 2009
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