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A172013 6*A142459(2*n+1,n)/(n+2). 0
3, 118, 20343, 8530698, 6711481694, 8575821262764, 16243345162977759, 42826533033277249154, 150138953276380791799098, 675925071086215282939520628 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..9.

FORMULA

a(n)=6*A142459(2*n+1,n)/(n+2)

MATHEMATICA

A[n_, 1] := 1; A[n_, n_] := 1;

A[n_, k_] := (4*n - 4*k + 1)A[n - 1, k - 1] + (4*k - 3)A[n - 1, k];

a = Table[A[n, k], {n, 20}, {k, n}];

Table[6*a[[2*n + 2, n + 1]]/(n + 2), {n, 0, 9}]

CROSSREFS

A142459,A142458,A172010

Sequence in context: A283883 A173053 A180393 * A143781 A114077 A176996

Adjacent sequences:  A172010 A172011 A172012 * A172014 A172015 A172016

KEYWORD

nonn

AUTHOR

Roger L. Bagula, Nov 19 2010

STATUS

approved

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Last modified December 1 22:12 EST 2021. Contains 349435 sequences. (Running on oeis4.)