n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 9 |
4 | 24 |
5 | 95 |
6 | 286 |
7 | 1099 |
8 | 3536 |
9 | 13479 |
10 | 45220 |
11 | 172150 |
12 | 594320 |
13 | 2265003 |
14 | 7983990 |
15 | 30487175 |
16 | 109174560 |
17 | 417812417 |
18 | 1514797020 |
19 | 5810065898 |
20 | 21275014800 |
21 | 81775140083 |
22 | 301892460012 |
23 | 1162703549474 |
24 | 4321730134624 |
25 | 16675372590850 |
26 | 62340424959176 |
27 | 240949471232124 |
[1,2,9,24,95,286,1099,3536,13479,45220,172150, 594320,2265003,7983990,30487175,109174560, 417812417,1514797020,5810065898,21275014800, 81775140083,301892460012,1162703549474, 4321730134624,16675372590850,62340424959176, 240949471232124] |