n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 8 |
5 | 25 |
6 | 80 |
7 | 267 |
8 | 911 |
9 | 3170 |
10 | 11192 |
11 | 39993 |
12 | 144320 |
13 | 525124 |
14 | 1924196 |
15 | 7093603 |
16 | 26288928 |
17 | 97878831 |
18 | 365918064 |
19 | 1372982706 |
20 | 5168555770 |
21 | 19514482964 |
22 | 73876936272 |
23 | 280363191353 |
24 | 1066357904128 |
25 | 4064204607372 |
[0,1,1,3,8,25,80,267,911,3170,11192,39993,144320, 525124,1924196,7093603,26288928,97878831, 365918064,1372982706,5168555770,19514482964, 73876936272,280363191353,1066357904128, 4064204607372] |