A230837 - OEIS

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A230837 as a simple table

n	a(n)
1	0
2	162
3	16496
4	1361842
5	114297392
6	9617769208
7	809092017194
8	68064007019810
9	5725825916551386
10	481680190844257754
11	40520931584406824770
12	3408788505934411237796
13	286761400254202666052780

[0,162,16496,1361842,114297392,9617769208, 809092017194,68064007019810,5725825916551386, 481680190844257754,40520931584406824770, 3408788505934411237796,286761400254202666052780]