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A186664
as a simple table
n
a(n)
1
1
2
5
3
72
4
842
5
7755
6
68550
7
614030
8
6014243
9
60013964
10
600013863
11
6000013912
[1,5,72,842,7755,68550,614030,6014243,60013964, 600013863,6000013912]