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Search: id:A131897
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| 1, 3, 2, 6, 2, 3, 11, 4, 2, 4, 20, 8, 4, 2, 5, 37, 16, 8, 4, 2, 6, 70, 32, 16, 8, 4, 2, 7, 135, 64, 32, 16, 8, 4, 2, 8, 264, 128, 64, 32, 16, 8, 4, 2, 9, 521, 256, 128, 64, 32, 16, 8, 4, 2, 10
(list; table; graph; listen)
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OFFSET
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0,2
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COMMENT
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Left column = A006127: (1, 3, 6, 11, 20, 37,...). Row sums = A131898: (1, 5, 11, 21, 39, 73,...).
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FORMULA
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A131321 + A131821 - A000012 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
3, 2;
6, 2, 3;
11, 4, 2, 4;
20, 8, 4, 2, 5;
37, 16, 8, 4, 2, 6;
70, 32, 16, 8, 4, 2, 7;
...
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CROSSREFS
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Cf. A130321, A131821, A006127, A131898.
Sequence in context: A019761 A133519 A135223 this_sequence A061187 A021758 A040008
Adjacent sequences: A131894 A131895 A131896 this_sequence A131898 A131899 A131900
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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 25 2007
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