n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 18 |
5 | 58 |
6 | 198 |
7 | 696 |
8 | 2506 |
9 | 9205 |
10 | 34344 |
11 | 129792 |
12 | 495834 |
13 | 1911640 |
14 | 7428444 |
15 | 29064650 |
16 | 114404410 |
17 | 452719183 |
18 | 1799994588 |
19 | 7187148262 |
20 | 28807364008 |
21 | 115865980972 |
22 | 467497031164 |
23 | 1891710323324 |
24 | 7675031497682 |
25 | 31215088847239 |
[1,1,2,6,18,58,198,696,2506,9205,34344,129792, 495834,1911640,7428444,29064650,114404410, 452719183,1799994588,7187148262,28807364008, 115865980972,467497031164,1891710323324, 7675031497682,31215088847239] |