A171206 - OEIS

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A171206 as a simple table

n	a(n)
0	1
1	1
2	12
3	348
4	19744
5	2108784
6	428817600
7	169398274624
8	131889504749568
9	203937600707475456
10	628561895904796999680
11	3868208404121906515820544
12	47571342639450113377565933568
13	1169589733863427138021074362433536

[1,1,12,348,19744,2108784,428817600,169398274624, 131889504749568,203937600707475456, 628561895904796999680,3868208404121906515820544, 47571342639450113377565933568, 1169589733863427138021074362433536]