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1, 1, 0, 0, 2, 0, 1, -2, 3, 0, 0, 0, 0, 4, 0, 1, 0, 0, -4, 5, 0, 0, 0, 0, 0, 0, 6, 1, -2, 3, -4, 5, -6, 7, 0, 0, 2, -3, 0, -5, -6, 0, 8, 0, 1, -2, 3, 0, 0, -6, 7, -8, 9, 0, 1, -2, 3, 0, 0, -6, 7, -8, 9, 0
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,5
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COMMENTS
| Row sums = phi(n), A000010: (1, 1, 2, 2, 4, 2, 6, 4, 6, 4,...)
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FORMULA
| A054521 * A128064 (unsigned) as infinite lower triangular matrices.
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EXAMPLE
| First few rows of the triangle are:
1;
1, 0;
0, 2, 0;
1, -2, 3, 0;
0, 0, 0, 4, 0;
1, 0, 0, -4, 5, 0;
...
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CROSSREFS
| Cf. A054521, A128064, A000010.
Sequence in context: A105422 A166291 A162986 * A080099 A127711 A069584
Adjacent sequences: A128581 A128582 A128583 * A128585 A128586 A128587
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KEYWORD
| tabl,sign
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), Mar 11 2007
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