OFFSET
0,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..690
Valentin Bonzom, Luca Lionni, Counting Gluings of Octahedra, Electronic Journal of Combinatorics 24(3) (2017), #P3.36. See Eq. (47).
FORMULA
a(n) ~ 2^(8*n+17/2) / (sqrt(Pi) * n^(3/2) * 3^(2*n+9/2)). - Vaclav Kotesovec, Aug 26 2017
MAPLE
a:= proc(n) option remember; `if`(n=0, 1, a(n-1)*8*
(4*n+1)*(2*n+1)*(4*n+3)/((3*n+2)*(3*n+4)*(n+1)))
end:
seq(a(n), n=0..20); # Alois P. Heinz, Aug 26 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Aug 26 2017
EXTENSIONS
More terms from Alois P. Heinz, Aug 26 2017
STATUS
approved