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A111878 as a simple table

n a(n)
0 1
1 7
2 21
3 231
4 3003
5 3003
6 51051
7 969969
8 969969
9 22309287
10 111546435
11 334639305
12 9704539845
13 300840735195
14 300840735195
15 300840735195
16 11131107202215
17 11131107202215
18 456375395290815
19 19624141997505045
20 19624141997505045

[1,7,21,231,3003,3003,51051,969969,969969,
 22309287,111546435,334639305,9704539845,
 300840735195,300840735195,300840735195,
 11131107202215,11131107202215,456375395290815,
 19624141997505045,19624141997505045]

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Last modified September 27 21:05 EDT 2021. Contains 347696 sequences. (Running on oeis4.)