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A038736 T(2n,n), array T as in A038792. 1
1, 4, 23, 141, 888, 5676, 36622, 237821, 1551727, 10161409, 66732392, 439267525, 2897064773, 19137833146, 126599140313, 838477244705, 5559158604616, 36891869005316, 245025744759152, 1628602268643928, 10832010390274304, 72088640151558145, 480026332241373281 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..22.

FORMULA

G.f.: (g-1)^2/((1-3*g)*(g^2-3*g+1)) where g*(1-g)^2 = x. - Mark van Hoeij, Nov 10 2011

a(n) = A134511(4n,2n). - Alois P. Heinz, Mar 02 2018

CROSSREFS

Cf. A134511.

Sequence in context: A067110 A290052 A158197 * A091642 A162561 A277921

Adjacent sequences:  A038733 A038734 A038735 * A038737 A038738 A038739

KEYWORD

nonn

AUTHOR

Clark Kimberling, May 02 2000

STATUS

approved

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Last modified February 16 18:53 EST 2019. Contains 320165 sequences. (Running on oeis4.)