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A016244 Expansion of 1/((1-x)(1-6x)(1-9x)). 0
1, 16, 187, 1942, 19033, 180628, 1681639, 15470674, 141251605, 1283357680, 11622778531, 105040363246, 947975408017, 8547451504972, 77021100541663, 693754126856458, 6247172473597069, 56244864253707304 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..17.

FORMULA

a(n) = 1/40 - (12/5)*6^n + (27/8)*9^n. - Neven Juric, Oct 22 2009

a(0)=1, a(1)=16, a(n) = 15*a(n-1) - 54*a(n-2) + 1. - Vincenzo Librandi, Feb 10 2011

PROG

(PARI) Vec(1/((1-x)*(1-6*x)*(1-9*x)) + O(x^40)) \\ Michel Marcus, Sep 04 2017

CROSSREFS

Sequence in context: A016249 A021049 A067308 * A240361 A016292 A231834

Adjacent sequences:  A016241 A016242 A016243 * A016245 A016246 A016247

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified May 17 12:55 EDT 2021. Contains 343971 sequences. (Running on oeis4.)