OFFSET
0,5
COMMENTS
This is the case a=4, b=1, c=2, y(0)=y(1)=y(2)=y(3)=1 of the recurrence shown in the Example 3.3 of "The Laurent phenomenon" (see Link lines, p. 10).
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..12
Sergey Fomin and Andrei Zelevinsky, The Laurent phenomenon, arXiv:math/0104241v1 [math.CO] (2001), Advances in Applied Mathematics 28 (2002), 119-144.
MAPLE
y:=proc(n) if n<4 then return 1: fi: return (y(n-1)^2*y(n-3)^4+y(n-2))/y(n-4): end:
seq(y(n), n=0..10);
MATHEMATICA
a[n_]:=If[n<4, 1, (a[n - 1]^2*a[n- 3]^4 + a[n - 2])/a[n - 4]]; Table[a[n], {n, 0, 10}] (* Indranil Ghosh, Mar 19 2017 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Matthew C. Russell, Apr 25 2012
STATUS
approved