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Search: id:A128257
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| 1, 0, 1, 2, -1, 1, -1, 2, -1, 1, 2, -1, 1, -1, 1, 0, 1, 0, -1, -1, 1, 2, -1, 1, -1, 1, -1, 1, -2, 3, -2, 2, -1, 1, -1, 1, 3, -2, 2, -1, 1, -1, 1, -1, 1, 0, 1, 0, 0, 0, 1, -1, 1, -1, 1
(list; table; graph; listen)
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OFFSET
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0,4
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COMMENT
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Row sums = A001227: (1, 1, 2, 1, 2, 2, 2,...), number of odd divisors of n.
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FORMULA
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A051731 * A097807 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
0, 1;
2, -1, 1;
-1, 2, -1, 1;
2, -1, 1, -1, 1;
0, 1, 0, 1, -1, 1;
...
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CROSSREFS
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Cf. A051731, A097807, A001227.
Sequence in context: A161096 A165983 A083894 this_sequence A106035 A105141 A103961
Adjacent sequences: A128254 A128255 A128256 this_sequence A128258 A128259 A128260
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KEYWORD
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tabl,sign
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Feb 21 2007
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