A088182 - OEIS

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A088182 as a simple table

n	a(n)
1	2
2	9
3	61
4	550
5	6201
6	83894
7	1324177
8	23886552
9	484745029
10	10930266652
11	271107065043
12	7335664739264
13	215030576905171
14	6788059632853620
15	229590704738375917
16	8283076586956304128
17	317510426598228001881

[2,9,61,550,6201,83894,1324177,23886552,484745029, 10930266652,271107065043,7335664739264, 215030576905171,6788059632853620, 229590704738375917,8283076586956304128, 317510426598228001881]