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A223219
as a simple table
n
a(n)
1
2
2
16
3
48
4
3926
5
278904
6
137420222
7
180758152704
8
1113866774364638
[2,16,48,3926,278904,137420222,180758152704, 1113866774364638]
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Last modified April 23 06:04 EDT 2024. Contains 371906 sequences. (Running on oeis4.)