OFFSET
0,1
COMMENTS
One of 10 linear second-order recurrence sequences satisfying (a(n)*a(n-1)-1) * (a(n)*a(n+1)-1) = (a(n)+1)^4 and together forming A350916.
LINKS
FORMULA
a(n) = 5*A032908(n) - 1. - Hugo Pfoertner, Jan 22 2022
G.f.: (3 - 2*x)*(3 - 7*x)/((1 - x)*(1 - 3*x + x^2)). - Stefano Spezia, Jan 22 2022
a(n) = 5*A001519(n) +4. - R. J. Mathar, Feb 07 2022
MATHEMATICA
nxt[{a_, b_}]:={b, 3b-a-4}; NestList[nxt, {9, 9}, 40][[;; , 1]] (* or *) LinearRecurrence[{4, -4, 1}, {9, 9, 14}, 40] (* Harvey P. Dale, Jul 19 2024 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Max Alekseyev, Jan 22 2022
STATUS
approved