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A112554
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Riordan array (c(x^2)^2, xc(x^2)), c(x) the g.f. of A000108.
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3
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1, 0, 1, 2, 0, 1, 0, 3, 0, 1, 5, 0, 4, 0, 1, 0, 9, 0, 5, 0, 1, 14, 0, 14, 0, 6, 0, 1, 0, 28, 0, 20, 0, 7, 0, 1, 42, 0, 48, 0, 27, 0, 8, 0, 1, 0, 90, 0, 75, 0, 35, 0, 9, 0, 1, 132, 0, 165, 0, 110, 0, 44, 0, 10, 0, 1, 0, 297, 0, 275, 0, 154, 0, 54, 0, 11, 0, 1, 429, 0, 572, 0, 429, 0, 208, 0, 65, 0
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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COMMENTS
| Inverse of A112552. Row sums are C(n+1,floor(n/2)), A037952(n+1).
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FORMULA
| Triangle begins 1; 0, 1; 2, 0, 1; 0, 3, 0, 1; 5, 0, 4, 0, 1; 0, 9, 0, 5, 0, 1; 14, 0, 14, 0, 6, 0, 1;
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CROSSREFS
| Sequence in context: A112552 A048154 A134511 * A120616 A108044 A104477
Adjacent sequences: A112551 A112552 A112553 * A112555 A112556 A112557
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KEYWORD
| easy,nonn,tabl
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AUTHOR
| Paul Barry (pbarry(AT)wit.ie), Sep 13 2005
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