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A145943
as a simple table
n
a(n)
1
1
2
1
3
17
4
101
5
1439
6
45325
7
2541179
8
249765423
9
48546882545
10
17503645590565
11
11722960747922791
[1,1,17,101,1439,45325,2541179,249765423, 48546882545,17503645590565,11722960747922791]