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1, 2, 1, 5, 5, 1, 15, 22, 9, 1, 52, 99, 61, 14, 1, 203, 471, 385, 135, 20, 1, 877, 2386, 2416, 1140, 260, 27, 1, 4140, 12867, 15470, 9156, 2835, 455, 35, 1, 21147, 73681, 102215, 72590, 28441, 6230, 742, 44, 1
(list;
table;
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refs;
listen;
history;
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internal format)
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OFFSET
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1,2
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COMMENTS
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Row sums = A035009 starting (1, 3, 11, 47, 227,...).
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LINKS
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Table of n, a(n) for n=1..45.
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FORMULA
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A008277 * A007318 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
2, 1;
5, 5, 1;
15, 22, 9, 1;
52, 99, 61, 14, 1;
203, 471, 385, 135, 20, 1;
...
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CROSSREFS
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Cf. A035009, A008277.
Sequence in context: A107842 A126216 A124733 * A059340 A204119 A046757
Adjacent sequences: A137594 A137595 A137596 * A137598 A137599 A137600
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KEYWORD
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nonn,tabl
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AUTHOR
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Gary W. Adamson, Jan 29 2008
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STATUS
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approved
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