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Search: id:A109267
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| A109267 |
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Riordan array (1/(1-xc(x)-x^2c(x)^2), xc(x)) with c(x) the g.f. of A000108. |
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+0
5
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| 1, 1, 1, 3, 2, 1, 9, 6, 3, 1, 29, 19, 10, 4, 1, 97, 63, 34, 15, 5, 1, 333, 215, 118, 55, 21, 6, 1, 1165, 749, 416, 201, 83, 28, 7, 1, 4135, 2650, 1485, 736, 320, 119, 36, 8, 1, 14845, 9490, 5355, 2705, 1220, 484, 164, 45, 9, 1, 53791, 34318, 19473, 9983, 4628, 1923
(list; table; graph; listen)
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OFFSET
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0,4
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COMMENT
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Inverse of Riordan array (1-x-x^2,x(1-x)), A109264. Row sums are A109262(n+1). Diagonal sums are A109268. Columns include A081696, A109262, A109263.
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EXAMPLE
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Rows begin
1;
1,1;
3,2,1;
9,6,3,1;
29,19,10,4,1;
97,63,34,15,5,1;
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CROSSREFS
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Sequence in context: A086963 A079749 A002350 this_sequence A108073 A057731 A126074
Adjacent sequences: A109264 A109265 A109266 this_sequence A109268 A109269 A109270
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KEYWORD
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easy,nonn,tabl
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), Jun 24 2005
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