n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 5 |
4 | 4 |
5 | 15 |
6 | 130 |
7 | 377 |
8 | 136 |
9 | 3145 |
10 | 3030 |
11 | 26269 |
12 | 18980 |
13 | 219413 |
14 | 21866 |
15 | 40725 |
16 | 331024 |
17 | 15306833 |
18 | 44237570 |
19 | 127848949 |
20 | 30790860 |
21 | 26045045 |
22 | 3086134658 |
23 | 8919094697 |
24 | 3222082760 |
25 | 3547425525 |
26 | 215297250946 |
27 | 622220603405 |
28 | 15502163092 |
[1,2,5,4,15,130,377,136,3145,3030,26269,18980, 219413,21866,40725,331024,15306833,44237570, 127848949,30790860,26045045,3086134658,8919094697, 3222082760,3547425525,215297250946,622220603405, 15502163092] |