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A266094
as a simple table
n
a(n)
1
1
2
4
3
13
4
32
5
104
6
228
7
576
8
1408
9
4104
10
9824
11
19152
12
39816
13
82944
14
196992
15
441294
16
881280
17
1911168
18
4539024
[1,4,13,32,104,228,576,1408,4104,9824,19152,39816, 82944,196992,441294,881280,1911168,4539024]