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A055838 T(2n+4,n), where T is the array in A055830. 1
5, 30, 162, 850, 4425, 22995, 119560, 622512, 3246750, 16963375, 88779900, 465386220, 2443204946, 12844119225, 67608235800, 356288599640, 1879625199825, 9925931817045, 52464942758250, 277546278287250 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..19.

FORMULA

Conjecture: 5*n*(n+3)*(n-1)*a(n) -2*(n-1)*(11*n+8)*(n+2)*a(n-1) -3*(3*n-1)*(3*n-2)*(n+1)*a(n-2)=0. - R. J. Mathar, Mar 13 2016

CROSSREFS

Sequence in context: A122995 A254944 A003731 * A318591 A094972 A084158

Adjacent sequences:  A055835 A055836 A055837 * A055839 A055840 A055841

KEYWORD

nonn

AUTHOR

Clark Kimberling, May 28 2000

STATUS

approved

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Last modified April 20 16:17 EDT 2019. Contains 322310 sequences. (Running on oeis4.)