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Search: id:A131404
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| 1, 1, 1, 1, 5, 1, 1, 7, 7, 1, 1, 11, 13, 11, 1, 1, 13, 27, 27, 13, 1, 1, 17, 39, 65, 39, 17, 1, 1, 19, 61, 111, 111, 61, 19, 1, 1, 23, 79, 193, 221, 193, 79, 23, 1, 1, 25, 109, 283, 433, 433, 283, 109, 25, 1
(list; table; graph; listen)
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OFFSET
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0,5
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COMMENT
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Row sums = A131405: (1, 2, 7, 16, 37, 82, 179,...).
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FORMULA
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2*A131402 - A000012 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
1, 1;
1, 5, 1;
1, 7, 7, 1;
1, 11, 13, 11, 1;
1, 13, 27, 27, 13, 1;
1, 17, 39, 65, 39, 17, 1;
...
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CROSSREFS
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Cf. A131402, A131405.
Sequence in context: A029646 A132737 A137754 this_sequence A078181 A054110 A132048
Adjacent sequences: A131401 A131402 A131403 this_sequence A131405 A131406 A131407
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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), Jul 07 2007
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