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A157593 as a simple table

n a(n)
2 1
3 9
4 378
5 37830
6 3403815
7 290684541
8 23648592268
9 2009304033948
10 165069279069345
11 12108533607540535
12 813240975212887518
13 51447280837022648370
14 3118521194576489150631
15 182797738828031587273965

[1,9,378,37830,3403815,290684541,23648592268,
 2009304033948,165069279069345,12108533607540535,
 813240975212887518,51447280837022648370,
 3118521194576489150631,182797738828031587273965]

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Last modified June 30 18:10 EDT 2022. Contains 354945 sequences. (Running on oeis4.)