A016260 - OEIS

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A016260

Expansion of 1/((1-x)(1-8x)(1-12x)).

1, 21, 325, 4485, 58501, 739461, 9173125, 112474245, 1368864901, 16579770501, 200184379525, 2412029622405, 29022892013701, 348902996523141, 4191862297147525, 50342558276728965, 604432385008416901

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OFFSET

0,2

LINKS

Table of n, a(n) for n=0..16.

Index entries for linear recurrences with constant coefficients, signature (21,-116,96).

FORMULA

a(n) = (21*12^(n+1) - 22*8^(n+1) + 1)/77. - Bruno Berselli, Mar 21 2011

a(n) = 20*a(n-1) - 96*a(n-2) + 1, n >= 2. - Vincenzo Librandi, Mar 21 2011

PROG

(PARI) Vec(1/((1-x)*(1-8*x)*(1-12*x)) + O(x^40)) \\ Michel Marcus, Sep 04 2017

CROSSREFS

Sequence in context: A214099 A340097 A237856 * A011810 A091947 A016195

Adjacent sequences: A016257 A016258 A016259 * A016261 A016262 A016263

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

STATUS

approved