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A116638
as a simple table
n
a(n)
1
1
2
2
3
158
4
301823
5
1851103
6
8616098
7
60528467
8
1087582634
9
1628818307
10
16205558969
[1,2,158,301823,1851103,8616098,60528467, 1087582634,1628818307,16205558969]