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A299328
as a simple table
n
a(n)
1
0
2
1
3
8
4
263
5
46286
6
27685946
7
65181402152
8
567774280392040
9
18419330490239501061
[0,1,8,263,46286,27685946,65181402152, 567774280392040,18419330490239501061]