A134356 - cp's OEIS frontend

A134356 a(n) = Product_{k=1..n-1} (3k+1)!/(n+k)!.

n	a(n)
1	1
2	4
3	42
4	1008
5	51480
6	5353920
7	1100473920
8	437480709120
9	330886851724800
10	470053968773760000
11	1241242628123282400000
12	6040838558884497984000000
13	53797620867616662708672000000
14	871394214986903051252166758400000

[1, 4, 42, 1008, 51480, 5353920, 1100473920, 437480709120, 330886851724800, 470053968773760000, 1241242628123282400000, 6040838558884497984000000, 53797620867616662708672000000, 871394214986903051252166758400000]

cp's OEIS Frontend

A134356 a(n) = Product_{k=1..n-1} (3k+1)!/(n+k)!.

Table of values

List of values