OFFSET
4,1
LINKS
Alois P. Heinz, Table of n, a(n) for n = 4..800
FORMULA
Recurrence: (n-2)*(n-1)*n*(n+1)*a(n) = 20*(n-2)*(n-1)*n*(2*n - 1)*a(n-1) - 140*(n-2)*(n-1)*(2*n - 3)*(2*n - 1)*a(n-2) + 400*(n-2)*(2*n - 5)*(2*n - 3)*(2*n - 1)*a(n-3) - 384*(2*n - 7)*(2*n - 5)*(2*n - 3)*(2*n - 1)*a(n-4). - Vaclav Kotesovec, Jun 01 2015
a(n) ~ 16^n / (24*sqrt(Pi)*n^(3/2)). - Vaclav Kotesovec, Jun 01 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 28 2015
STATUS
approved