n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 19 |
4 | 66 |
5 | 238 |
6 | 908 |
7 | 3529 |
8 | 14135 |
9 | 57331 |
10 | 236815 |
11 | 987215 |
12 | 4171451 |
13 | 17743854 |
14 | 76236546 |
15 | 329234054 |
16 | 1432684708 |
17 | 6260115889 |
18 | 27520807300 |
19 | 121392770521 |
20 | 538131641681 |
21 | 2392166249013 |
22 | 10677961529384 |
23 | 47775692521711 |
24 | 214507462217087 |
25 | 965057325884904 |
26 | 4354759835262268 |
27 | 19684925876046996 |
[1,2,6,19,66,238,908,3529,14135,57331,236815, 987215,4171451,17743854,76236546,329234054, 1432684708,6260115889,27520807300,121392770521, 538131641681,2392166249013,10677961529384, 47775692521711,214507462217087,965057325884904, 4354759835262268,19684925876046996] |