A098658 - cp's OEIS frontend

A098658 a(n) = 3^n(2n)!/(n!)^2.

n	a(n)
0	1
1	6
2	54
3	540
4	5670
5	61236
6	673596
7	7505784
8	84440070
9	956987460
10	10909657044
11	124965162504
12	1437099368796
13	16581915793800
14	191876454185400
15	2225766868550640
16	25874539846901190
17	301362287628613860

[1, 6, 54, 540, 5670, 61236, 673596, 7505784, 84440070, 956987460, 10909657044, 124965162504, 1437099368796, 16581915793800, 191876454185400, 2225766868550640, 25874539846901190, 301362287628613860]

cp's OEIS Frontend

A098658 a(n) = 3^n(2n)!/(n!)^2.

Table of values

List of values

cp's OEIS Frontend

A098658 a(n) = 3^n*(2*n)!/(n!)^2.

Table of values

List of values

A098658 a(n) = 3^n(2n)!/(n!)^2.