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A174302
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Riordan array ((1-x^2c(x)^2)/(1-xc(x)-x^2c(x)^2),xc(x)), c(x) the g.f. of A000108.
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0
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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
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OFFSET
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0,4
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COMMENTS
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LINKS
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EXAMPLE
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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
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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