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Search: id:A128317
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| 1, 0, 1, 3, -2, 1, 0, 4, -3, 1, 5, -4, 6, -4, 1, 0, 5, -9, 10, -5, 1, 7, -6, 15, -20, 15, -6, 1, 0, 12, -24, 36, -35, 21, -7, 1, 9, -12, 30, -56, 70, -56, 28, -8, 1, 0, 9, -30, 80, -125, 126, -84, 36, -9, 1
(list; table; graph; listen)
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OFFSET
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1,4
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COMMENT
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Row sums = phi(n), A000010: (1, 1, 2, 2, 4, 2, 6, 4, 6,...).
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FORMULA
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A054523 * A007318 as infinite lower triangular matrices. A007318 is signed by columns: (+, -, +,...).
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EXAMPLE
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First few rows of the triangle are:
1;
0, 1;
3, -2, 1;
0, 4, -3, 1;
5, -4, 6, -4, 1;
0, 5, -9, 10, -5, 1;
7, -6, 15, -20, 15, -6, 1;
...
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CROSSREFS
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Cf. A054523, A007318, A000010.
Sequence in context: A083721 A158459 A031251 this_sequence A084269 A051427 A098825
Adjacent sequences: A128314 A128315 A128316 this_sequence A128318 A128319 A128320
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KEYWORD
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tabl,sign
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Feb 25 2007
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