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A221923
as a simple table
n
a(n)
1
6
2
350
3
13228
4
508281
5
19513309
6
749481703
7
28788205897
8
1105748138634
9
42471447510183
10
1631315682219574
[6,350,13228,508281,19513309,749481703, 28788205897,1105748138634,42471447510183, 1631315682219574]