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A034270 f(n,n+3) where f is given in A034261. 1
0, 1, 13, 99, 605, 3289, 16653, 80444, 375972, 1715130, 7681586, 33913385, 148018455, 640049865, 2746422525, 11708971560, 49647131160, 209523969630, 880668859590, 3688555690950, 15401089588794, 64128925255626, 266376231244178, 1104047701891624 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

MATHEMATICA

Table[n*(n^2+4*n+1)*Binomial[2*n+3, n]/((n+4)*(n+5)), {n, 0, 20}] (* Vaclav Kotesovec, Oct 27 2012 *)

PROG

(MAGMA) [n*(n^2+4*n+1)*Binomial(2*n+3, n)/((n+4)*(n+5)): n in [0..25]]; // Vincenzo Librandi, May 04 2013

(PARI) a(n)=n*(n^2+4*n+1)*binomial(2*n+3, n)/((n+4)*(n+5)); \\ Joerg Arndt, May 04 2013

CROSSREFS

Sequence in context: A006976 A282992 A295271 * A201427 A155646 A089936

Adjacent sequences:  A034267 A034268 A034269 * A034271 A034272 A034273

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling

EXTENSIONS

Corrected and extended Apr 21 2000 - N. J. A. Sloane.

STATUS

approved

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Last modified January 18 13:55 EST 2020. Contains 331010 sequences. (Running on oeis4.)