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A174302 Riordan array ((1-x^2c(x)^2)/(1-xc(x)-x^2c(x)^2),xc(x)), c(x) the g.f. of A000108. 0
1, 1, 1, 2, 2, 1, 6, 5, 3, 1, 19, 15, 9, 4, 1, 63, 48, 29, 14, 5, 1, 215, 160, 97, 49, 20, 6, 1, 749, 548, 333, 173, 76, 27, 7, 1, 2650, 1914, 1165, 617, 284, 111, 35, 8, 1, 9490, 6785, 4135, 2221, 1056, 439, 155, 44, 9, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
0,4
COMMENTS
First row is essentially A109262.
LINKS
EXAMPLE
Triangle begins
1,
1, 1,
2, 2, 1,
6, 5, 3, 1,
19, 15, 9, 4, 1,
63, 48, 29, 14, 5, 1,
215, 160, 97, 49, 20, 6, 1,
749, 548, 333, 173, 76, 27, 7, 1,
Production matrix begins
1, 1,
1, 1, 1,
2, 1, 1, 1,
2, 1, 1, 1, 1,
3, 1, 1, 1, 1, 1,
3, 1, 1, 1, 1, 1, 1,
4, 1, 1, 1, 1, 1, 1, 1
CROSSREFS
Sequence in context: A130469 A106381 A064784 * A108074 A189175 A271776
KEYWORD
easy,nonn,tabl
AUTHOR
Paul Barry, Mar 15 2010
STATUS
approved

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Last modified March 28 05:02 EDT 2024. Contains 371235 sequences. (Running on oeis4.)