A162039 - OEIS

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A162039 as a simple table

n	a(n)
1	2
2	5
3	17
4	86
5	698
6	8853
7	157014
8	3797408
9	115090450
10	4234205332
11	185001672488
12	9420876404098
13	550756524966710

[2,5,17,86,698,8853,157014,3797408,115090450, 4234205332,185001672488,9420876404098, 550756524966710]