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A088369 E.g.f.: 1/(1-x-x^2)^x. 0
1, 0, 2, 9, 44, 390, 3474, 37800, 471344, 6602904, 103271400, 1779944760, 33542915592, 686101244400, 15139184749584, 358465510133640, 9066087526045440, 243928110816129600, 6956913949298380224 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

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

FORMULA

a(n) ~ n! * n^(c-1) / (GAMMA(c) * 5^(c/2) * c^c * c^n), where c = (sqrt(5)-1)/2. - Vaclav Kotesovec, Nov 05 2014

MATHEMATICA

With[{nn=30}, CoefficientList[Series[1/(1-x-x^2)^x, {x, 0, nn}], x]Range[ 0, nn]!] (* Harvey P. Dale, May 06 2012 *)

CROSSREFS

Sequence in context: A322613 A318913 A327940 * A303938 A059388 A059392

Adjacent sequences:  A088366 A088367 A088368 * A088370 A088371 A088372

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Sep 28 2003

EXTENSIONS

Definition corrected by Vaclav Kotesovec, Nov 05 2014

STATUS

approved

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Last modified April 7 04:20 EDT 2020. Contains 333292 sequences. (Running on oeis4.)