n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 30 |
6 | 106 |
7 | 426 |
8 | 1930 |
9 | 9690 |
10 | 53578 |
11 | 322650 |
12 | 2106250 |
13 | 14790810 |
14 | 111327178 |
15 | 893091930 |
16 | 7614236170 |
17 | 68695024410 |
18 | 654301474378 |
19 | 6557096219610 |
20 | 69005893630090 |
21 | 760519875693210 |
22 | 8763511069234378 |
23 | 105343011537811290 |
24 | 1319139904954848010 |
[1,2,4,10,30,106,426,1930,9690,53578,322650, 2106250,14790810,111327178,893091930,7614236170, 68695024410,654301474378,6557096219610, 69005893630090,760519875693210,8763511069234378, 105343011537811290,1319139904954848010] |