A204515 - cp's OEIS frontend

A204515 a(n) = (2n)! (2n+1)! / ((n+1)^2 n!^3).

n	a(n)
0	1
1	3
2	40
3	1050
4	42336
5	2328480
6	163088640
7	13913499600
8	1401656256000
9	162984589447680
10	21497802046156800
11	3172717285311974400
12	518147911684085760000
13	92790773980160256000000
14	18083066033253630689280000
15	3810158522787893903827200000

[1, 3, 40, 1050, 42336, 2328480, 163088640, 13913499600, 1401656256000, 162984589447680, 21497802046156800, 3172717285311974400, 518147911684085760000, 92790773980160256000000, 18083066033253630689280000, 3810158522787893903827200000]

cp's OEIS Frontend

A204515 a(n) = (2n)! (2n+1)! / ((n+1)^2 n!^3).

Table of values

List of values

cp's OEIS Frontend

A204515 a(n) = (2*n)! * (2*n+1)! / ((n+1)^2 * n!^3).

Table of values

List of values

A204515 a(n) = (2n)! (2n+1)! / ((n+1)^2 n!^3).