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A260755 as a simple table

n a(n)
1 1
2 1
3 1
4 2
5 4
6 252
7 2304
8 343712160
9 17361257184
10 817232021393069622912
11 337615438409845853800240
12 1002314950534089781700930298791626826040504
13 4687493998578314511363173974007271386258869456

[1,1,1,2,4,252,2304,343712160,17361257184,
 817232021393069622912,337615438409845853800240,
 1002314950534089781700930298791626826040504,
 4687493998578314511363173974007271386258869456]

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Last modified August 3 23:57 EDT 2024. Contains 374905 sequences. (Running on oeis4.)