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A103466
as a simple table
n
a(n)
1
1
2
1
3
3
4
11
5
50
6
269
7
1605
8
10102
9
65323
10
430302
11
2868320
12
19299334
13
130807068
14
892075515
15
6115673262
[1,1,3,11,50,269,1605,10102,65323,430302,2868320, 19299334,130807068,892075515,6115673262]