OFFSET
1,2
COMMENTS
FORMULA
a(n) ~ c * d^n * phi^(n^3/3 + n^2/2) / 5^(n^2/4), where phi = A001622 = (1+sqrt(5))/2 is the golden ratio, d = 3.99077126463315610748163699882855013294148355045548571306491607634698645935... and c = 0.019290318831631524125422284... - Vaclav Kotesovec, Apr 09 2021
MAPLE
F:= combinat[fibonacci]:
a:= n-> mul(mul(F(i)+F(j), i=2..j-1), j=3..n+1):
seq(a(n), n=1..12); # Alois P. Heinz, Jul 23 2017
MATHEMATICA
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Jan 03 2012
EXTENSIONS
Name edited by Alois P. Heinz, Jul 23 2017
STATUS
approved