n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 12 |
4 | 55 |
5 | 274 |
6 | 1444 |
7 | 7923 |
8 | 44803 |
9 | 259325 |
10 | 1529008 |
11 | 9151327 |
12 | 55454164 |
13 | 339543312 |
14 | 2097460255 |
15 | 13055579858 |
16 | 81803671623 |
17 | 515552408141 |
18 | 3265924761595 |
19 | 20784056808550 |
20 | 132812937949820 |
21 | 851847261569025 |
22 | 5482066256568375 |
23 | 35388168141000935 |
24 | 229081418808206500 |
25 | 1486757986305948780 |
26 | 9672120691595571320 |
[1,1,3,12,55,274,1444,7923,44803,259325,1529008, 9151327,55454164,339543312,2097460255,13055579858, 81803671623,515552408141,3265924761595, 20784056808550,132812937949820,851847261569025, 5482066256568375,35388168141000935, 229081418808206500,1486757986305948780, 9672120691595571320] |