n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 15 |
4 | 50 |
5 | 176 |
6 | 638 |
7 | 2354 |
8 | 8789 |
9 | 33099 |
10 | 125477 |
11 | 478193 |
12 | 1830271 |
13 | 7030571 |
14 | 27088871 |
15 | 104647631 |
16 | 405187826 |
17 | 1571990936 |
18 | 6109558586 |
19 | 23782190486 |
20 | 92705454896 |
21 | 361834392116 |
22 | 1413883873976 |
23 | 5530599237776 |
24 | 21654401079326 |
25 | 84859704298202 |
26 | 332818970772254 |
[1,2,5,15,50,176,638,2354,8789,33099,125477, 478193,1830271,7030571,27088871,104647631, 405187826,1571990936,6109558586,23782190486, 92705454896,361834392116,1413883873976, 5530599237776,21654401079326,84859704298202, 332818970772254] |