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1, 3, -1, 3, 0, -1, 6, -3, 0, 0, 3, 0, 0, 0, -1, 9, -3, -3, 0, 0, 1, 3, 0, 0, 0, 0, 0, -1, 10, -6, 0, 0, 0, 0, 0, 0, 6, 0, -3, 0, 0, 0, 0, 0, 0, 9, -3, 0, 0, -3, 0, 0, 0, 0, 1, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 18, -9, -6, 0, 0, 3, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 9, -3, 0, 0, 0, 0, -3, 0, 0, 0, 0, 0, 0, 1
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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COMMENTS
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Left border = A007425.
Right border = mu(n), A008683.
Row sums = d(n), A000010: (1, 2, 2, 3, 2, 4, 2,...).
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LINKS
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Table of n, a(n) for n=1..105.
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FORMULA
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Triangle read by rows, A127172 * A128407 = (A051731)^3 * A128407, 1<=k<=n
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EXAMPLE
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First few rows of the triangle =
1;
3, -1;
3, 0, -1;
6, -3, 0, 0;
3, 0, 0, 0, -1;
9, -3, -3, 0, 0, 1;
3, 0, 0, 0, 0, 0, -1;
10, -6, 0, 0, 0, 0, 0, 0;
6, 0, -3, 0, 0, 0, 0, 0, 0;
9, -3, 0, 0, -3, 0, 0, 0, 0, 1;
...
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CROSSREFS
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Cf. A007425, A127172, A128407, A051731, A000010, A008683.
Sequence in context: A131088 A136157 A266260 * A127172 A011087 A180021
Adjacent sequences: A143350 A143351 A143352 * A143354 A143355 A143356
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KEYWORD
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tabl,sign
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AUTHOR
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Gary W. Adamson, Aug 10 2008
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STATUS
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approved
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