n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 8 |
5 | 18 |
6 | 50 |
7 | 150 |
8 | 429 |
9 | 1258 |
10 | 3835 |
11 | 11740 |
12 | 36148 |
13 | 112856 |
14 | 355318 |
15 | 1124582 |
16 | 3582186 |
17 | 11477162 |
18 | 36939043 |
19 | 119387415 |
20 | 387393424 |
21 | 1261422550 |
22 | 4120343870 |
23 | 13498085604 |
24 | 44337516318 |
25 | 145993301239 |
26 | 481812344551 |
27 | 1593439356575 |
28 | 5280074015618 |
29 | 17528034861180 |
[1,1,1,3,8,18,50,150,429,1258,3835,11740,36148, 112856,355318,1124582,3582186,11477162,36939043, 119387415,387393424,1261422550,4120343870, 13498085604,44337516318,145993301239,481812344551, 1593439356575,5280074015618,17528034861180] |