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A170764 G.f.: (1+x)/(1-44*x). 50
1, 45, 1980, 87120, 3833280, 168664320, 7421230080, 326534123520, 14367501434880, 632170063134720, 27815482777927680, 1223881242228817920, 53850774658067988480, 2369434084954991493120, 104255099738019625697280, 4587224388472863530680320 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..600

Index entries for linear recurrences with constant coefficients, signature (44).

FORMULA

a(n)= Sum_{k, 0<=k<=n} A097805(n,k)*(-1)^(n-k)*45^k. [From Philippe Deléham, Dec 04 2009]

a(0) = 1; for n>0, a(n) = 45*44^(n-1). [From Vincenzo Librandi, Dec 05 2009]

MATHEMATICA

CoefficientList[Series[(1 + x)/(1 - 44*x), {x, 0, 30}], x] (* Vincenzo Librandi, Dec 09 2012 *)

CROSSREFS

Sequence in context: A170630 A170678 A170726 * A218747 A121009 A264061

Adjacent sequences:  A170761 A170762 A170763 * A170765 A170766 A170767

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 04 2009

STATUS

approved

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Last modified April 19 03:11 EDT 2019. Contains 322237 sequences. (Running on oeis4.)