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Search: id:A143256
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| 1, 1, -2, 1, 0, -3, 1, -2, 0, 0, 1, 0, 0, 0, -5, 1, -2, -3, 0, 0, 6, 1, 0, 0, 0, 0, 0, -7, 1, -2, 0, 0, 0, 0, 0, 0, 1, 0, -3, 0, 0, 0, 0, 0, 0, 1, -2, 0, 0, -5, 0, 0, 0, 0, 10, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, -11, 1, -2, -3, 0, 0, 6, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -13, 1, -2, 0, 0, 0, 0, -7, 0, 0, 0, 0, 0, 0, 14
(list; table; graph; listen)
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OFFSET
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1,3
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COMMENT
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Right border = n*mu(n) = A055615.
Row sums = A023900: (1, -1, -2, -1, -4, 2, -6,...).
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FORMULA
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Triangle read by rows, A051731 * A128407 * A127648, 1<=k<=n
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EXAMPLE
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First few rows of the triangle =
1;
1, -2;
1, 0, -3;
1, -2, 0, 0;
1, 0, 0, 0, -5;
1, -2, -3, 0, 0, 6;
1, 0, 0, 0, 0, 0, -7;
...
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CROSSREFS
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Cf. A008683, A055615, A051731, A128407, A127648, A023900.
Sequence in context: A029293 A167192 A029312 this_sequence A143151 A130106 A127093
Adjacent sequences: A143253 A143254 A143255 this_sequence A143257 A143258 A143259
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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), Aug 02 2008
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