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Search: id:A135230
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| 1, 1, 1, 2, 1, 1, 1, 2, 2, 1, 2, 2, 4, 3, 1, 1, 3, 6, 7, 4, 1, 2, 3, 9, 13, 11, 5, 1, 1, 4, 12, 22, 24, 16, 6, 1, 2, 4, 16, 34, 46, 40, 22, 7, 1, 1, 5, 20, 50, 80, 86, 62, 29, 8, 1
(list; table; graph; listen)
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OFFSET
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1,4
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COMMENT
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row sums = A135231
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FORMULA
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A103451 * A000012(signed) * A007318, where A000012(signed) = (1; -1,1; 1,-1,1;...).
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EXAMPLE
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First few rows of the triangle are:
1;
1, 1;
2, 1, 1;
1, 2, 2, 1;
2, 2, 4, 3, 1;
1, 3, 6, 7, 4, 1;
2, 3, 9, 13, 11, 5, 1;
1, 4, 12, 22, 24, 16, 6, 1;
2, 4, 16, 34, 46, 40, 22, 7, 1;
...
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CROSSREFS
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Cf. A103451, A135231, A007318, A000012.
Adjacent sequences: A135227 A135228 A135229 this_sequence A135231 A135232 A135233
Sequence in context: A037226 A089641 A086995 this_sequence A117957 A139632 A145702
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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), Nov 23 2007
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