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A143585
as a simple table
n
a(n)
0
2
1
28
2
530
3
7793
4
97255
5
1175775
6
13804822
7
157523559
8
1768264167
9
19589296501
10
214795459468
[2,28,530,7793,97255,1175775,13804822,157523559, 1768264167,19589296501,214795459468]