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A170768 G.f.: (1+x)/(1-48*x). 50
1, 49, 2352, 112896, 5419008, 260112384, 12485394432, 599298932736, 28766348771328, 1380784741023744, 66277667569139712, 3181328043318706176, 152703746079297896448, 7329779811806299029504, 351829430966702353416192, 16887812686401712963977216 (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 (48).

FORMULA

a(n)= Sum_{k, 0<=k<=n} A097805(n,k)*(-1)^(n-k)*49^k. [From Philippe Deléham, Dec 04 2009]

a(0) = 1; for n>0, a(n) = 49*48^(n-1). [From Vincenzo Librandi, Dec 05 2009]

MATHEMATICA

CoefficientList[Series[(1 + x)/(1 - 48*x), {x, 0, 30}], x] (* Vincenzo Librandi, Dec 09 2012 *)

CROSSREFS

Sequence in context: A170634 A170682 A170730 * A218751 A120999 A087752

Adjacent sequences:  A170765 A170766 A170767 * A170769 A170770 A170771

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Dec 04 2009

STATUS

approved

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Last modified April 20 22:22 EDT 2019. Contains 322310 sequences. (Running on oeis4.)