OFFSET
0,2
LINKS
FORMULA
G.f.: (1 - x - x^2)/(1 - 10*x - x^2).
a(n) = Sum_{k=0..n} A155161(n,k)*9^k. - Philippe Deléham, Feb 08 2012
E.g.f.: 1 + 9*exp(5*x)*sinh(sqrt(26)*x)/sqrt(26). - Stefano Spezia, Mar 01 2023
MATHEMATICA
LinearRecurrence[{10, 1}, {1, 9, 90}, 20] (* Harvey P. Dale, Dec 20 2022 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Philippe Deléham, Jan 21 2009
STATUS
approved