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A221603
as a simple table
n
a(n)
1
0
2
2
3
54
4
12270
5
19521328
6
240257613761
7
22596355738886108
[0,2,54,12270,19521328,240257613761, 22596355738886108]
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Last modified March 22 16:15 EDT 2023. Contains 361432 sequences. (Running on oeis4.)
