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A264832
as a simple table
n
a(n)
1
1
2
2
3
4
4
15
5
134
6
978
7
10370
8
114292
9
2035620
10
29935144
11
567866832
12
14295267600
13
488489391072
14
12470564424960
[1,2,4,15,134,978,10370,114292,2035620,29935144, 567866832,14295267600,488489391072,12470564424960]