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A157546 as a simple table

n a(n)
2 1
3 9
4 54
5 1290
6 47385
7 1080891
8 19941831
9 335927439
10 5541820740
11 87714576070
12 1349748111657
13 20228679068676
14 290345411571852
15 3966279413712840
16 51810189395306490
17 652108043960695984
18 7955418278826810531

[1,9,54,1290,47385,1080891,19941831,335927439,
 5541820740,87714576070,1349748111657,
 20228679068676,290345411571852,3966279413712840,
 51810189395306490,652108043960695984,
 7955418278826810531]

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Last modified December 2 08:36 EST 2022. Contains 358493 sequences. (Running on oeis4.)