A125447 - OEIS

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A125447 as a simple table

n	a(n)
0	1
1	12
2	132
3	1380
4	15260
5	169252
6	1879782
7	20881502
8	231972500
9	2577002988
10	28628206202
11	318033966218
12	3533075401202
13	39249335918974
14	436025331971998
15	4843854954088810
16	53810935050499732
17	597791791563925916

[1,12,132,1380,15260,169252,1879782,20881502, 231972500,2577002988,28628206202,318033966218, 3533075401202,39249335918974,436025331971998, 4843854954088810,53810935050499732, 597791791563925916]