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Search: id:A143446
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| 1, 0, 2, -1, 2, 4, -1, 0, 4, 8, -2, 0, 4, 8, 16, -1, -2, 0, 8, 16, 32, -2, -2, 0, 8, 16, 32, 64, -2, -2, 0, 0, 16, 32, 64, 128, -1, -2, -4, 0, 16, 32, 64, 128, 256, -1, -4, -4, 0, 0, 32, 64, 128, 256, 512
(list; table; graph; listen)
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OFFSET
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1,3
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COMMENT
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Row sums = A085945: (1, 2, 5, 11, 26, 53, 116,...).
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FORMULA
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Triangle read by rows, A000012 * A143424, 1<=k<=n, where the operation A000012 * A143424 takes partial sums by column terms.
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EXAMPLE
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First few rows of the triangle =
1;
0, 2;
-1, 2, 4;
-1, 0, 4, 8;
-2, 0, 4, 8, 16;
-1, -2, 0, 8, 16, 32;
-2, -2, 0, 8, 16, 32, 64;
...
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CROSSREFS
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Cf. A143424, A085945.
Sequence in context: A131022 A137408 A007461 this_sequence A132014 A110330 A097864
Adjacent sequences: A143443 A143444 A143445 this_sequence A143447 A143448 A143449
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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 15 2008
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