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A293999 as a simple table

n a(n)
0 1
1 1
2 3
3 15
4 105
5 945
6 10395
7 135135
8 675675
9 3790647
10 23694083
11 162961399
12 1209395171
13 9332799283
14 70178707279
15 474578729935
16 3181796735723
17 21683288205723
18 150990425051331
19 1069361164106091
20 7617764489275535
21 53863160510249543
22 375786310609620379

[1,1,3,15,105,945,10395,135135,675675,3790647,
 23694083,162961399,1209395171,9332799283,
 70178707279,474578729935,3181796735723,
 21683288205723,150990425051331,1069361164106091,
 7617764489275535,53863160510249543,
 375786310609620379]

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Last modified September 26 09:15 EDT 2021. Contains 347664 sequences. (Running on oeis4.)