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A127371
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Triangle, row sums = n, left column = d(n).
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0
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1, 2, 0, 2, 1, 0, 3, 0, 1, 0, 2, 1, 1, 1, 0, 4, 1, 0, 0, 1, 0, 2, 1, 1, 1, 1, 1, 0, 4, 0, 2, 0, 1, 0, 1, 0, 3, 2, 0, 1, 1, 0, 1, 1, 0, 4, 1, 2, 1, 0, 0, 1, 0, 1, 0, 1, 0
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OFFSET
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1,2
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COMMENTS
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Row sums = n, left column = d(n), (A000005: 1, 2, 2, 3, 2, 4, 2,...)
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LINKS
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Table of n, a(n) for n=1..57.
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FORMULA
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A051731 * A054521, as infinite lower triangular matrices. Inverse Mobius transform of A054521.
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EXAMPLE
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First few rows of the triangle are:
1;
2, 0;
2, 1, 0;
3, 0, 1, 0;
2, 1, 1, 1, 0;
4, 1, 0, 0, 1, 0;
2, 1, 1, 1, 1, 1, 0;
4, 0, 2, 0, 1, 0, 1, 0;
3, 2, 0, 1, 1, 0, 1, 1, 0;
...
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CROSSREFS
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Cf. A051731, A000005, A054521.
Sequence in context: A190436 A133696 A195050 * A036849 A097364 A254204
Adjacent sequences: A127368 A127369 A127370 * A127372 A127373 A127374
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KEYWORD
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nonn,tabl
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AUTHOR
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Gary W. Adamson, Jan 12 2007
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STATUS
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approved
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