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A240040
as a simple table
n
a(n)
1
2
2
4
3
26
4
346
5
7514
6
640643
7
104619164
8
49892724623
[2,4,26,346,7514,640643,104619164,49892724623]
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Last modified April 25 13:01 EDT 2024. Contains 371969 sequences. (Running on oeis4.)