n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 3 |
3 | 11 |
4 | 20 |
5 | 84 |
6 | 455 |
7 | 1364 |
8 | 10659 |
9 | 58695 |
10 | 254540 |
11 | 728364 |
12 | 13516580 |
13 | 133595384 |
14 | 812646120 |
15 | 5327923964 |
16 | 68971338435 |
17 | 838101203939 |
18 | 7588384207404 |
19 | 69322940121435 |
20 | 490005293940084 |
[1,2,3,11,20,84,455,1364,10659,58695,254540, 728364,13516580,133595384,812646120,5327923964, 68971338435,838101203939,7588384207404, 69322940121435,490005293940084] |