A024488 - cp's OEIS frontend

A024488 a(n) = (1/(3n-1))*M(3n; n,n,n), where M(...) is a multinomial coefficient.

n	a(n)
1	3
2	18
3	210
4	3150
5	54054
6	1009008
7	19953648
8	411543990
9	8764362750
10	191413682460
11	4266468608220
12	96706621786320
13	2223107844022800
14	51721284534408000
15	1215794995122150720
16	28837137540553512390

[3, 18, 210, 3150, 54054, 1009008, 19953648, 411543990, 8764362750, 191413682460, 4266468608220, 96706621786320, 2223107844022800, 51721284534408000, 1215794995122150720, 28837137540553512390]

cp's OEIS Frontend

A024488 a(n) = (1/(3n-1))*M(3n; n,n,n), where M(...) is a multinomial coefficient.

Table of values

List of values