

A097761


Inverse of binomial transform of Whitney triangle.


1



1, 2, 1, 4, 4, 1, 10, 13, 6, 1, 28, 42, 26, 8, 1, 84, 138, 102, 43, 10, 1, 264, 462, 385, 198, 64, 12, 1, 858, 1573, 1430, 845, 338, 89, 14, 1, 2860, 5434, 5278, 3458, 1610, 530, 118, 16, 1, 9724, 19006, 19448, 13804, 7208, 2788, 782, 151, 18, 1, 33592
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OFFSET

0,2


COMMENTS

As an element of the Riordan group, this is (1xC(x))C(x), xC(x)^2), where C(x)=(1(14*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108. Inverse of A097750. Row sums have g.f. (1xC(x))C(x)/(1xC(x)^2), or 1,1,1,2,5,14,42,...


LINKS

Table of n, a(n) for n=0..55.


EXAMPLE

Rows begin {1}, {2,1}, {4,4,1}, {10,13,6,1},...


CROSSREFS

Sequence in context: A202710 A200965 A117427 * A200756 A108556 A122440
Adjacent sequences: A097758 A097759 A097760 * A097762 A097763 A097764


KEYWORD

easy,sign,tabl


AUTHOR

Paul Barry, Aug 23 2004


STATUS

approved



