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A128257
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Inverse Moebius transform of A097807.
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0
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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;
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graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,4
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COMMENTS
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Row sums = A001227: (1, 1, 2, 1, 2, 2, 2,...), number of odd divisors of n.
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LINKS
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Table of n, a(n) for n=0..54.
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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: A211987 A165983 A083894 * A198254 A106035 A105141
Adjacent sequences: A128254 A128255 A128256 * 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, Feb 21 2007
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STATUS
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approved
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