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A205265
as a simple table
n
a(n)
1
223
2
21537
3
7191926
4
8174802163
5
32079295935853
6
433101439309430572
7
20100570131126768440800
[223,21537,7191926,8174802163,32079295935853, 433101439309430572,20100570131126768440800]