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Search: id:A127139
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| 1, -2, 1, -3, 0, 1, 0, -2, 0, 1, -5, 0, 0, 0, 1, 6, -3, -2, 0, 0, 1, -7, 0, 0, 0, 0, 0, 1, 0, 0, 0, -2, 0, 0, 0, 1, 0, 0, -3, 0, 0, 0, 0, 0, 1, 10, -5, 0, 0, -2, 0, 0, 0, 0, 1
(list; table; graph; listen)
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OFFSET
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1,2
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COMMENT
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Row sums = A023900: (1, -1, -2, -1, -4, 2, -6, -1,...) Left column = A055615: (1, -2, -3, 0, -5, 6, -7,...) A127139 * [1, 2, 3,...] = [1, 0, 0, 0...] A127139 * [1, 0, 0, 0,...] = A055615 A127140 is the square of A127139
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FORMULA
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Inverse triangle of A126988
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EXAMPLE
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First few rows of the triangle are:
1;
-2, 1;
-3, 0, 1;
0, -2, 0, 1;
-5, 0, 0, 0, 1;
6, -3, -2, 0, 0, 1;
-7, 0, 0, 0, 0, 0, 1;
...
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CROSSREFS
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Cf. A126988, A055615, A023900, A127140.
Sequence in context: A010249 A002431 A062963 this_sequence A071431 A140699 A140256
Adjacent sequences: A127136 A127137 A127138 this_sequence A127140 A127141 A127142
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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), Jan 06 2007
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