n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 6 |
4 | 16 |
5 | 41 |
6 | 108 |
7 | 299 |
8 | 828 |
9 | 2299 |
10 | 6401 |
11 | 17875 |
12 | 50062 |
13 | 140601 |
14 | 399267 |
15 | 1144669 |
16 | 3283839 |
17 | 9427981 |
18 | 27090715 |
19 | 77911897 |
20 | 224272499 |
21 | 646157234 |
22 | 1863317958 |
23 | 5377939756 |
24 | 15535195892 |
25 | 45060652609 |
26 | 131334677147 |
27 | 382907083385 |
[1,1,3,6,16,41,108,299,828,2299,6401,17875,50062, 140601,399267,1144669,3283839,9427981,27090715, 77911897,224272499,646157234,1863317958, 5377939756,15535195892,45060652609,131334677147, 382907083385] |