n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 3 |
4 | 13 |
5 | 45 |
6 | 412 |
7 | 4375 |
8 | 66988 |
9 | 1199038 |
10 | 25033020 |
11 | 589567451 |
12 | 15480284910 |
13 | 448042511917 |
14 | 14173510363424 |
15 | 486548852524671 |
16 | 18014399792942108 |
17 | 715605766365332673 |
18 | 30359882832309625502 |
19 | 1370096714607544395379 |
20 | 65536000002956800104588 |
[1,1,2,3,13,45,412,4375,66988,1199038,25033020, 589567451,15480284910,448042511917,14173510363424, 486548852524671,18014399792942108, 715605766365332673,30359882832309625502, 1370096714607544395379,65536000002956800104588] |