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A364338
G.f. satisfies A(x) = (1 + x) * (1 + x*A(x)^5).
10
1, 2, 11, 105, 1140, 13555, 170637, 2235472, 30161255, 416248640, 5848462880, 83378361111, 1203100853951, 17537182300140, 257858115407535, 3819894878557990, 56958234329850060, 854192593184162160, 12875579347191388830, 194963091634569681550, 2964229359714424159370, 45234864131654311730160
OFFSET
0,2
LINKS
FORMULA
a(n) = Sum_{k=0..n} binomial(5*k+1,k) * binomial(5*k+1,n-k) / (5*k+1).
PROG
(PARI) a(n) = sum(k=0, n, binomial(5*k+1, k)*binomial(5*k+1, n-k)/(5*k+1));
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Jul 19 2023
STATUS
approved