n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 13 |
4 | 44 |
5 | 205 |
6 | 806 |
7 | 3457 |
8 | 14168 |
9 | 59449 |
10 | 246410 |
11 | 1027861 |
12 | 4273412 |
13 | 17797573 |
14 | 74055854 |
15 | 308289865 |
16 | 1283082416 |
17 | 5340773617 |
18 | 22229288978 |
19 | 92525540509 |
20 | 385114681820 |
21 | 1602959228221 |
22 | 6671950592822 |
23 | 27770534239633 |
24 | 115588623814664 |
[0,1,2,13,44,205,806,3457,14168,59449,246410, 1027861,4273412,17797573,74055854,308289865, 1283082416,5340773617,22229288978,92525540509, 385114681820,1602959228221,6671950592822, 27770534239633,115588623814664] |