OFFSET
0,2
COMMENTS
First differences of A190872.
LINKS
Kevin Ryde, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (11,-9).
FORMULA
G.f.: (1 - x)/(1 - 11*x + 9*x^2).
E.g.f.: exp(11*x/2)*(85*cosh(sqrt(85)*x/2) + 9*sqrt(85)*sinh(sqrt(85)*x/2))/85. - Stefano Spezia, Mar 03 2023
MATHEMATICA
LinearRecurrence[{11, -9}, {1, 10}, 20] (* Amiram Eldar, Mar 15 2020 *)
PROG
(PARI) a(n) = polcoeff(lift(('x-1)*Mod('x, 'x^2-11*'x+9)^n), 1);
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Kevin Ryde, Mar 15 2020
STATUS
approved