n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 12 |
6 | 35 |
7 | 108 |
8 | 369 |
9 | 1285 |
10 | 4655 |
11 | 17073 |
12 | 63600 |
13 | 238591 |
14 | 901971 |
15 | 3426576 |
16 | 13079255 |
17 | 50107909 |
18 | 192622052 |
19 | 742624232 |
20 | 2870671950 |
21 | 11123060678 |
22 | 43191857688 |
23 | 168047007728 |
24 | 654999700403 |
25 | 2557227044764 |
26 | 9999088822075 |
27 | 39153010938487 |
28 | 153511100594603 |
[1,1,1,2,5,12,35,108,369,1285,4655,17073,63600, 238591,901971,3426576,13079255,50107909,192622052, 742624232,2870671950,11123060678,43191857688, 168047007728,654999700403,2557227044764, 9999088822075,39153010938487,153511100594603] |