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A167444 as a simple table

n a(n)
1 1
2 1
3 2
4 3
5 15
6 384
7 135135
8 13749310575
9 46620662575398912000
10 8687364368561751199826958100282265625
11 352999527454840466971061863960307904899505075341088595453568994140625 

[1,1,2,3,15,384,135135,13749310575,
 46620662575398912000,
 8687364368561751199826958100282265625,
 35299952745484046697106186396030790489950507534108\
 8595453568994140625]

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Last modified May 13 19:55 EDT 2024. Contains 372522 sequences. (Running on oeis4.)