n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 44 |
6 | 147 |
7 | 495 |
8 | 1758 |
9 | 6392 |
10 | 23877 |
11 | 90960 |
12 | 352682 |
13 | 1388471 |
14 | 5536070 |
15 | 22333566 |
16 | 90999168 |
17 | 374144507 |
18 | 1550788644 |
19 | 6474314495 |
20 | 27208663317 |
21 | 115026686024 |
22 | 488951418197 |
23 | 2088810690352 |
24 | 8964559511261 |
25 | 38636855716466 |
26 | 167177656758582 |
27 | 726003687715148 |
28 | 3163527887839747 |
[1,1,2,5,15,44,147,495,1758,6392,23877,90960, 352682,1388471,5536070,22333566,90999168, 374144507,1550788644,6474314495,27208663317, 115026686024,488951418197,2088810690352, 8964559511261,38636855716466,167177656758582, 726003687715148,3163527887839747] |