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A065577
as a simple table
n
a(n)
1
2
2
6
3
28
4
127
5
810
6
5402
7
38807
8
291400
9
2274205
10
18200488
11
149091160
12
1243722370
13
10533150855
14
90350630388
[2,6,28,127,810,5402,38807,291400,2274205, 18200488,149091160,1243722370,10533150855, 90350630388]