n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 14 |
4 | 48 |
5 | 164 |
6 | 560 |
7 | 1912 |
8 | 6528 |
9 | 22288 |
10 | 76096 |
11 | 259808 |
12 | 887040 |
13 | 3028544 |
14 | 10340096 |
15 | 35303296 |
16 | 120532992 |
17 | 411525376 |
18 | 1405035520 |
19 | 4797091328 |
20 | 16378294272 |
21 | 55918994432 |
22 | 190919389184 |
23 | 651839567872 |
24 | 2225519493120 |
25 | 7598398836736 |
26 | 25942556360704 |
27 | 88573427769344 |
[1,1,4,14,48,164,560,1912,6528,22288,76096,259808, 887040,3028544,10340096,35303296,120532992, 411525376,1405035520,4797091328,16378294272, 55918994432,190919389184,651839567872, 2225519493120,7598398836736,25942556360704, 88573427769344] |