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Search: id:A131256
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| 1, 0, 1, 1, 1, 1, 0, 2, 1, 1, 1, 2, 3, 1, 1, 0, 3, 4, 3, 1, 1, 1, 3, 7, 5, 3, 1, 1, 0, 4, 9, 10, 5, 3, 1, 11, 4, 13, 16, 11, 5, 3, 1, 1, 0, 5, 16, 26, 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 = A052952: (1, 1, 3, 4, 8, 12, 21, 33,...). A131257 = A052509 * A000012(signed).
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FORMULA
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A000012(signed) * A052509, where the signed version of A000012 = (1; -1,1; 1,-1,1;...).
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EXAMPLE
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First few rows of the triangle are:
1;
0, 1;
1, 1, 1;
0, 2, 1, 1;
1, 2, 3, 1, 1;
0, 3, 4, 3, 1, 1;
1, 3, 7, 5, 3, 1, 1;
...
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CROSSREFS
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Cf. A052509, A000012, A131257.
Sequence in context: A069545 A122520 A058393 this_sequence A122945 A119338 A054124
Adjacent sequences: A131253 A131254 A131255 this_sequence A131257 A131258 A131259
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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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