n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 10 |
4 | 24 |
5 | 70 |
6 | 276 |
7 | 820 |
8 | 2616 |
9 | 8702 |
10 | 27902 |
11 | 89500 |
12 | 291050 |
13 | 939222 |
14 | 3029950 |
15 | 9798606 |
16 | 31657182 |
17 | 102237766 |
18 | 330356240 |
19 | 1067310022 |
20 | 3447911968 |
21 | 11139391996 |
22 | 35988377472 |
23 | 116265759012 |
24 | 375619824338 |
25 | 1213515477460 |
26 | 3920484872552 |
27 | 12665878390278 |
[1,0,2,10,24,70,276,820,2616,8702,27902,89500, 291050,939222,3029950,9798606,31657182,102237766, 330356240,1067310022,3447911968,11139391996, 35988377472,116265759012,375619824338, 1213515477460,3920484872552,12665878390278] |