A202972 - OEIS

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A202972 as a simple table

n	a(n)
1	1
2	2
3	17
4	385
5	31380
6	8071997
7	6330398606
8	15305115754880
9	113359928263133320
10	2565928235760939767164
11	177686302889022383527488349
12	37653160193950657089306550224687
13	24413727008012244865702150476410950284

[1,2,17,385,31380,8071997,6330398606, 15305115754880,113359928263133320, 2565928235760939767164, 177686302889022383527488349, 37653160193950657089306550224687, 24413727008012244865702150476410950284]