n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 8 |
4 | 24 |
5 | 72 |
6 | 229 |
7 | 740 |
8 | 2460 |
9 | 8317 |
10 | 28590 |
11 | 99556 |
12 | 350661 |
13 | 1246998 |
14 | 4471801 |
15 | 16153007 |
16 | 58722226 |
17 | 214687361 |
18 | 788855637 |
19 | 2911701588 |
20 | 10790952975 |
21 | 40139185202 |
22 | 149805575022 |
23 | 560804604385 |
24 | 2105273566444 |
25 | 7923577070408 |
26 | 29892583708055 |
27 | 113020768615090 |
28 | 428190609376563 |
29 | 1625319129822979 |
30 | 6180270575440241 |
[1,1,3,8,24,72,229,740,2460,8317,28590,99556, 350661,1246998,4471801,16153007,58722226, 214687361,788855637,2911701588,10790952975, 40139185202,149805575022,560804604385, 2105273566444,7923577070408,29892583708055, 113020768615090,428190609376563,1625319129822979, 6180270575440241] |