A306642 - cp's OEIS frontend

A306642 a(n) = Sum_{k=0..n} (3n)!/(k! (n-k)!)^3.

n	a(n)
0	1
1	12
2	900
3	94080
4	11988900
5	1704214512
6	260453217024
7	41886697881600
8	6996546610936740
9	1203384096358158000
10	211855235800656848400
11	38011289046678107596800
12	6928290032159649797280000
13	1279703438754969901486464000
14	239070018975087493229806080000

[1, 12, 900, 94080, 11988900, 1704214512, 260453217024, 41886697881600, 6996546610936740, 1203384096358158000, 211855235800656848400, 38011289046678107596800, 6928290032159649797280000, 1279703438754969901486464000, 239070018975087493229806080000]

cp's OEIS Frontend

A306642 a(n) = Sum_{k=0..n} (3n)!/(k! (n-k)!)^3.

Table of values

List of values

cp's OEIS Frontend

A306642 a(n) = Sum_{k=0..n} (3*n)!/(k! * (n-k)!)^3.

Table of values

List of values

A306642 a(n) = Sum_{k=0..n} (3n)!/(k! (n-k)!)^3.