n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 4 |
4 | 16 |
5 | 58 |
6 | 215 |
7 | 806 |
8 | 3051 |
9 | 11602 |
10 | 44307 |
11 | 169840 |
12 | 653204 |
13 | 2519314 |
14 | 9740350 |
15 | 37739300 |
16 | 146498531 |
17 | 569642584 |
18 | 2218322463 |
19 | 8650367796 |
20 | 33773500347 |
21 | 132008143328 |
22 | 516495270723 |
23 | 2022721237326 |
24 | 7928249018667 |
25 | 31100068617294 |
[1,1,4,16,58,215,806,3051,11602,44307,169840, 653204,2519314,9740350,37739300,146498531, 569642584,2218322463,8650367796,33773500347, 132008143328,516495270723,2022721237326, 7928249018667,31100068617294] |