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A080630
as a simple table
n
a(n)
0
1
1
12
2
114
3
924
4
6539
5
39528
6
199926
7
806136
8
2761740
9
8656152
10
22334112
11
32420448
12
18780864
13
2166720
14
6624
[1,12,114,924,6539,39528,199926,806136,2761740, 8656152,22334112,32420448,18780864,2166720,6624]