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A054768 a[n+2] = (2n+3) a[n+1] + (n+1)^2 a[n]. 0
-2, 1, 1, 9, 72, 792, 10512, 165168, 2992608, 61445088, 1409857920, 35751525120, 992877886080, 29970166769280, 976990865518080, 34206887786803200, 1280236466132467200, 51004766655793036800, 2155155171665039308800 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..18.

K. S. Brown, Integer Sequences Related To PI

MATHEMATICA

RecurrenceTable[{a[0]==-2, a[1]==1, a[n+2]==(2n+3)a[n+1]+(n+1)^2 a[n]}, a, {n, 20}] (* Harvey P. Dale, Dec 31 2017 *)

CROSSREFS

Sequence in context: A283321 A155718 A256168 * A104251 A153731 A262226

Adjacent sequences:  A054765 A054766 A054767 * A054769 A054770 A054771

KEYWORD

sign,easy

AUTHOR

N. J. A. Sloane, May 26 2000

EXTENSIONS

More terms from James A. Sellers, May 27 2000

STATUS

approved

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Last modified February 20 08:38 EST 2018. Contains 299384 sequences. (Running on oeis4.)