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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, 2, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -2, 3, -2, 3, -2, 2, -1, 1, -1, 1, -1, 1, 2, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1
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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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FORMULA
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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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KEYWORD
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AUTHOR
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EXTENSIONS
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a(18) = 1 corrected and more terms from Georg Fischer, Jun 08 2023
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STATUS
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approved
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