n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 19 |
5 | 62 |
6 | 207 |
7 | 704 |
8 | 2431 |
9 | 8502 |
10 | 30056 |
11 | 107236 |
12 | 385662 |
13 | 1396652 |
14 | 5088865 |
15 | 18642420 |
16 | 68624295 |
17 | 253706790 |
18 | 941630580 |
19 | 3507232740 |
20 | 13105289370 |
21 | 49114150020 |
22 | 184560753390 |
23 | 695267483664 |
24 | 2625197720454 |
25 | 9933364416572 |
[1,1,2,6,19,62,207,704,2431,8502,30056,107236, 385662,1396652,5088865,18642420,68624295, 253706790,941630580,3507232740,13105289370, 49114150020,184560753390,695267483664, 2625197720454,9933364416572] |