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Search: id:A127445
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| A127445 |
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Triangle, left column = sigma(n), row sums = T(n). |
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+0
1
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| 1, 3, 0, 4, 2, 0, 7, 0, 3, 0, 6, 2, 3, 4, 0, 12, 4, 0, 0, 5, 0, 8, 2, 3, 4, 5, 6, 0, 15, 0, 9, 0, 5, 0, 7, 0, 13, 8, 0, 4, 5, 0, 7, 8, 0, 18, 4, 9, 8, 0, 0, 7, 0, 9, 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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Left column = sigma(n), A000203: (1, 3, 4, 7, 6, 12, 8, 15, 13,...), row sums = T(n), A000215: (1, 3, 6, 10, 15,...)
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FORMULA
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M * Q as infinite lower triangular matrices, M = A126988, Q = A127368.
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EXAMPLE
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First few rows of the triangle are:
1;
3, 0;
4, 2, 0;
7, 0, 3, 0;
6, 2, 3, 4, 0;
12, 4, 0, 0, 5, 0;
8, 2, 3, 4, 5, 6, 0;
...
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CROSSREFS
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Cf. A126988, A127368, A000217, A000203.
Sequence in context: A077140 A003815 A131486 this_sequence A081170 A077150 A065453
Adjacent sequences: A127442 A127443 A127444 this_sequence A127446 A127447 A127448
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KEYWORD
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nonn,tabl,uned
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Jan 14 2007
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