OFFSET
0,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (20,-109,90).
FORMULA
a(n) = (8*10^(n+2) - 9^(n+3) + 1)/72. - Bruno Berselli, Mar 21 2011
a(n) = 19*a(n-1) - 90*a(n-2) + 1, n >= 2. - Vincenzo Librandi, Mar 21 2011
MATHEMATICA
Table[(2^(n + 4)*5^(n + 1) - 9^(n + 2) + 1)/72, {n, 40}] (* or *) CoefficientList[Series[1/((1 - z) (1 - 9*z) (1 - 10*z)), {z, 0, 40}], z] (* Vladimir Joseph Stephan Orlovsky, Jul 21 2011 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved