OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Paul Leyland, Factors of Cullen and Woodall numbers.
Paul Leyland, Generalized Cullen and Woodall numbers.
Index entries for linear recurrences with constant coefficients, signature (19,-99,81).
FORMULA
a(n) = 19*a(n-1) - 99*a(n-2) + 81*a(n-3); a(0)=1, a(1)=10, a(2)=163. - Harvey P. Dale, Jan 16 2016
From Elmo R. Oliveira, Sep 09 2024: (Start)
G.f.: -(72*x^2 - 9*x + 1)/((x - 1)*(9*x - 1)^2).
E.g.f.: exp(x)*(9*x*exp(8*x) + 1).
a(n) = A158749(n) + 1. (End)
MATHEMATICA
Table[n*9^n+1, {n, 0, 20}] (* or *) LinearRecurrence[{19, -99, 81}, {1, 10, 163}, 20]
PROG
(Magma) [ n*9^n+1: n in [0..20]]; // Vincenzo Librandi, Sep 16 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Oct 19 2001
STATUS
approved