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Search: id:A131257
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| 1, 0, 1, 0, 1, 1, -1, 2, 1, 1, 0, 1, 3, 1, 1, 0, 1, 4, 3, 1, 1, 1, 0, 6, 5, 3, 1, 1, 0, 1, 6, 10, 5, 3, 1, 1, 0, 1, 7, 15, 11, 5, 3, 1, 1, -1, 2, 7, 2, 20, 11, 5, 3, 1, 1
(list; table; graph; listen)
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OFFSET
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0,8
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COMMENT
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Row sums = A009517: (1, 1, 2, 3, 6, 10, 17, 27, 44,...). A131256 = A000012(signed) * A052509.
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FORMULA
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A052509 * A000012(signed, + - + - by columns), as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
0, 1;
0, 1, 1;
-1, 2, 1, 1;
0, 1, 3, 1, 1;
0, 1, 4, 3, 1, 1;
1, 0, 6, 5, 3, 1, 1;
...
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CROSSREFS
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Cf. A052509, A000012, A131256, A009517.
Sequence in context: A004602 A059571 A027052 this_sequence A105806 A129501 A092921
Adjacent sequences: A131254 A131255 A131256 this_sequence A131258 A131259 A131260
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KEYWORD
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nonn,tabl
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Jun 23 2007
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