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A347856 as a simple table

n a(n)
0 1
1 20
2 990
3 56576
4 3432198
5 215147520
6 13768454700
7 893768826880
8 58626071754822
9 3876225891958784
10 257898242928604740
11 17245961314149335040
12 1158088115444301759900
13 78040346182201091555328 

[1,20,990,56576,3432198,215147520,13768454700,
 893768826880,58626071754822,3876225891958784,
 257898242928604740,17245961314149335040,
 1158088115444301759900,78040346182201091555328]

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Last modified April 23 08:33 EDT 2024. Contains 371905 sequences. (Running on oeis4.)