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A007189
as a simple table
n
a(n)
1
2
2
6
3
540
4
1240029000000
5
108919557672285397857708866735205615234375000000000000000000000000
[2,6,540,1240029000000, 10891955767228539785770886673520561523437500000000\ 0000000000000000]
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Last modified April 18 06:12 EDT 2024. Contains 371769 sequences. (Running on oeis4.)
