OFFSET
0,2
LINKS
Colin Barker, Table of n, a(n) for n = 0..1000
Ira M. Gessel, Rational Functions With Nonnegative Integer Coefficients, slides, 50th Séminaire Lotharingien de Combinatoire, 2003.
Index entries for linear recurrences with constant coefficients, signature (0,11,150).
FORMULA
From Colin Barker, Apr 14 2016: (Start)
a(n) = 2^(1+n)*3^n - (-3-4*i)^n - (-3+4*i)^n where i is the imaginary unit.
a(n) = 11*a(n-2) + 150*a(n-3) for n>2.
(End)
PROG
(PARI) concat(0, Vec((18*x+86*x^2)/(1-11*x^2-150*x^3) + O(x^30))) \\ Michel Marcus, Aug 28 2015
(PARI) a(n) = 2^(1+n)*3^n - (-3-4*I)^n - (-3+4*I)^n \\ Colin Barker, Apr 14 2016
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Nov 15 2014
STATUS
approved