A013086 - OEIS

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A013086 as a simple table

n	a(n)
0	2
1	8
2	306
3	30312
4	5993442
5	1954414728
6	953905703058
7	650409090147432
8	590608999475062722
9	688945370061378414600
10	1003968219388341434081778
11	1787361481981953243947889000
12	3817161109431432209134714003362

[2,8,306,30312,5993442,1954414728,953905703058, 650409090147432,590608999475062722, 688945370061378414600,1003968219388341434081778, 1787361481981953243947889000, 3817161109431432209134714003362]