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A068107 as a simple table

n a(n)
1 1
2 1
3 2
4 8
5 39
6 235
7 1644
8 13152
9 118368
10 1183681
11 13020490
12 156245880
13 2031196439
14 28436750147
15 426551252206
16 6824820035296
17 116021940600031
18 2088394930800558
19 39679503685210601
20 793590073704212020 

[1,1,2,8,39,235,1644,13152,118368,1183681,
 13020490,156245880,2031196439,28436750147,
 426551252206,6824820035296,116021940600031,
 2088394930800558,39679503685210601,
 793590073704212020]

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Last modified September 7 19:14 EDT 2024. Contains 375749 sequences. (Running on oeis4.)