n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 14 |
3 | 60 |
4 | 279 |
5 | 1251 |
6 | 5329 |
7 | 21532 |
8 | 83225 |
9 | 310464 |
10 | 1126502 |
11 | 4000602 |
12 | 13973725 |
13 | 48187521 |
14 | 164535708 |
15 | 557528652 |
16 | 1878067349 |
17 | 6297614277 |
18 | 21043287325 |
19 | 70125062642 |
20 | 233198372319 |
21 | 774246922848 |
22 | 2567419361916 |
23 | 8505547438596 |
24 | 28157369861593 |
25 | 93162331494255 |
26 | 308108749498202 |
[1,3,14,60,279,1251,5329,21532,83225,310464, 1126502,4000602,13973725,48187521,164535708, 557528652,1878067349,6297614277,21043287325, 70125062642,233198372319,774246922848, 2567419361916,8505547438596,28157369861593, 93162331494255,308108749498202] |