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Search: id:A127626
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| A127626 |
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Triangle, row sums = n*d(n). |
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+0
1
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| 1, 1, 3, 1, 0, 5, 1, 3, 0, 8, 1, 0, 0, 0, 9, 1, 3, 5, 0, 0, 15, 1, 0, 0, 0, 0, 0, 13, 1, 3, 0, 8, 0, 0, 0, 20
(list; table; graph; listen)
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OFFSET
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1,3
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COMMENT
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Row sums = n*d(n), A038040: (1, 4, 6, 12, 10, 24,...); right border = A018804: (1, 3, 5, 8, 9, 15, 13,...).
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FORMULA
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Inverse Mobius transform of a matrix with A018804 in the main diagonal and the rest zeros.
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EXAMPLE
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First few rows of the triangle are:
1;
1, 3;
1, 0, 5;
1, 3, 0, 8;
1, 0, 0, 0, 9;
1, 3, 5, 0, 0, 15;
...
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CROSSREFS
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Cf. A051731, A038040, A018804.
Sequence in context: A127627 A119302 A134560 this_sequence A121440 A011084 A021326
Adjacent sequences: A127623 A127624 A127625 this_sequence A127627 A127628 A127629
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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 20 2007
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