n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 14 |
5 | 42 |
6 | 132 |
7 | 428 |
8 | 1417 |
9 | 4757 |
10 | 16119 |
11 | 54963 |
12 | 188219 |
13 | 646460 |
14 | 2224944 |
15 | 7668915 |
16 | 26461005 |
17 | 91371594 |
18 | 315689675 |
19 | 1091166442 |
20 | 3772747245 |
21 | 13047503222 |
22 | 45131078409 |
23 | 156129312025 |
24 | 540181837728 |
25 | 1869097588540 |
26 | 6467740095295 |
[1,1,2,5,14,42,132,428,1417,4757,16119,54963, 188219,646460,2224944,7668915,26461005,91371594, 315689675,1091166442,3772747245,13047503222, 45131078409,156129312025,540181837728, 1869097588540,6467740095295] |