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A170735 G.f.: (1+x)/(1-15*x). 50
1, 16, 240, 3600, 54000, 810000, 12150000, 182250000, 2733750000, 41006250000, 615093750000, 9226406250000, 138396093750000, 2075941406250000, 31139121093750000, 467086816406250000, 7006302246093750000, 105094533691406250000, 1576418005371093750000, 23646270080566406250000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..800

Index entries for linear recurrences with constant coefficients, signature (15).

FORMULA

a(n)= Sum_{k, 0<=k<=n} A097805(n,k)*(-1)^(n-k)*16^k. [From Philippe Deléham, Dec 04 2009]

a(0) = 1; for n>0, a(n) = 16*15^(n-1). [From Vincenzo Librandi, Dec 05 2009]

a(0)=1, a(1)=16, a(n) = 15*a(n-1). - Vincenzo Librandi, Dec 10 2012

MATHEMATICA

Join[{1}, 16*15^Range[0, 25]] (* Vladimir Joseph Stephan Orlovsky, Jul 13 2011 *)

CoefficientList[Series[(1 + x)/(1 - 15 x), {x, 0, 30}], x] ( * Vincenzo Librandi, Dec 10 2012 *)

Join[{1}, NestList[15#&, 16, 20]] (* Harvey P. Dale, Sep 25 2015 *)

PROG

(MAGMA) [1] cat[16*15^(n-1): n in [1..20]]; // Vincenzo Librandi, Dec 10 2012

CROSSREFS

Sequence in context: A170601 A170649 A170697 * A058667 A005619 A204793

Adjacent sequences:  A170732 A170733 A170734 * A170736 A170737 A170738

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Dec 04 2009

STATUS

approved

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Last modified September 20 05:51 EDT 2019. Contains 327212 sequences. (Running on oeis4.)