OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (2,0,-1)
FORMULA
Equals A022097(n) - 1.
G.f.: (6*x-5*x^2)/(1-2*x+x^3). - Franklin T. Adams-Watters, Oct 17 2006
a(n) = F(n+2) + 5*F(n) - 1, where F = A000045. - G. C. Greubel, Aug 25 2017
MATHEMATICA
LinearRecurrence[{2, 0, -1}, {0, 6, 7}, 60] (* Vladimir Joseph Stephan Orlovsky, Feb 11 2012 *)
PROG
(PARI) x='x+O('x^50); concat([0], Vec((6*x-5*x^2)/(1-2*x+x^3))) \\ G. C. Greubel, Aug 25 2017
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved