n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 14 |
5 | 58 |
6 | 238 |
7 | 1516 |
8 | 9020 |
9 | 79892 |
10 | 635984 |
11 | 7127764 |
12 | 70757968 |
13 | 949723600 |
14 | 11260506056 |
15 | 175400319992 |
16 | 2416123951952 |
17 | 42776273847184 |
18 | 671238787733920 |
19 | 13302324582892048 |
20 | 234257439470319776 |
21 | 5135062189842955616 |
22 | 100292619307729965152 |
[1,1,2,5,14,58,238,1516,9020,79892,635984,7127764, 70757968,949723600,11260506056,175400319992, 2416123951952,42776273847184,671238787733920, 13302324582892048,234257439470319776, 5135062189842955616,100292619307729965152] |