n | a(n) |
---|---|
2 | 1 |
3 | 6 |
4 | 34 |
5 | 200 |
6 | 1095 |
7 | 6230 |
8 | 34636 |
9 | 195552 |
10 | 1099140 |
11 | 6218520 |
12 | 35210736 |
13 | 200099328 |
14 | 1139401263 |
15 | 6504768270 |
16 | 37211008120 |
17 | 213311576192 |
18 | 1225053737622 |
19 | 7047867363108 |
20 | 40612374024300 |
21 | 234376628718960 |
22 | 1354498970905080 |
23 | 7838134441085520 |
24 | 45412879702456800 |
25 | 263417461793120000 |
[1,6,34,200,1095,6230,34636,195552,1099140, 6218520,35210736,200099328,1139401263,6504768270, 37211008120,213311576192,1225053737622, 7047867363108,40612374024300,234376628718960, 1354498970905080,7838134441085520, 45412879702456800,263417461793120000] |