A056097 - OEIS

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A056097 as a simple table

n	a(n)
1	6
2	8
3	30
4	36
5	44
6	156
7	696
8	944
9	2800
10	2928
11	3600
12	6660
13	16064
14	195456
15	260864
16	784128
17	4189184
18	12573696
19	201289728
20	17179541504
21	274876596224
22	824631361536

[6,8,30,36,44,156,696,944,2800,2928,3600,6660, 16064,195456,260864,784128,4189184,12573696, 201289728,17179541504,274876596224,824631361536]