n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 12 |
5 | 34 |
6 | 110 |
7 | 364 |
8 | 1248 |
9 | 4356 |
10 | 15520 |
11 | 56022 |
12 | 204726 |
13 | 755472 |
14 | 2812004 |
15 | 10543718 |
16 | 39791070 |
17 | 151022006 |
18 | 576090250 |
19 | 2207493080 |
20 | 8493196536 |
21 | 32797115398 |
22 | 127071214442 |
23 | 493831241234 |
24 | 1924504466246 |
25 | 7519182311366 |
26 | 29447430754182 |
27 | 115577336981932 |
[1,1,2,4,12,34,110,364,1248,4356,15520,56022, 204726,755472,2812004,10543718,39791070,151022006, 576090250,2207493080,8493196536,32797115398, 127071214442,493831241234,1924504466246, 7519182311366,29447430754182,115577336981932] |