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A198001
as a simple table
n
a(n)
1
1
2
2
3
11
4
106
5
1866
6
62687
7
4073132
8
495518389
9
114972961293
10
50791847794948
[1,2,11,106,1866,62687,4073132,495518389, 114972961293,50791847794948]