A385980 - cp's OEIS frontend

A385980 a(0) = 1; a(n) = Sum_{k=0..n-1} (k+1) * binomial(k+3,3) * binomial(n-1,k) * a(k) * a(n-1-k).

n	a(n)
0	1
1	1
2	9
3	295
4	24921
5	4504516
6	1543745107
7	919392117722
8	890353538984905
9	1330464112593541120
10	2940642877993896450701
11	9284167814032856189142864
12	40666099850492306669400356041
13	241073945237343019120798232332320
14	1893421587381601800604423881821405775

[1, 1, 9, 295, 24921, 4504516, 1543745107, 919392117722, 890353538984905, 1330464112593541120, 2940642877993896450701, 9284167814032856189142864, 40666099850492306669400356041, 241073945237343019120798232332320, 1893421587381601800604423881821405775]

cp's OEIS Frontend

A385980 a(0) = 1; a(n) = Sum_{k=0..n-1} (k+1) * binomial(k+3,3) * binomial(n-1,k) * a(k) * a(n-1-k).

Table of values

List of values