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Search: id:A131768
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| 1, 3, 1, 5, 5, 1, 7, 11, 7, 1, 9, 19, 19, 9, 1, 11, 29, 39, 29, 11, 1, 13, 41, 69, 69, 41, 13, 1, 15, 55, 111, 139, 111, 55, 15, 1, 17, 71, 167, 251, 251, 167, 71, 17, 1, 19, 89, 239, 419, 503, 419, 239, 89, 19, 1
(list; table; graph; listen)
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OFFSET
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0,2
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COMMENT
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Row sums = A000295, the Eulerian numbers, starting (1, 4, 11, 26, 57, 120,...).
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FORMULA
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2*(A007318 * A097807) - A000012 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
3, 1;
5, 5, 1;
7, 11, 7, 1;
9, 19, 19, 9, 1;
11, 29, 39, 29, 11, 1;
13, 41, 69, 69, 41, 13, 1;
15, 55, 111, 139, 111, 55, 15, 1;
...
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CROSSREFS
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Cf. A007318, A097807, A000012, A000295.
Sequence in context: A131302 A131305 A131303 this_sequence A084533 A082985 A111125
Adjacent sequences: A131765 A131766 A131767 this_sequence A131769 A131770 A131771
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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 13 2007
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