n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 23 |
4 | 89 |
5 | 338 |
6 | 1286 |
7 | 4911 |
8 | 18769 |
9 | 71722 |
10 | 273982 |
11 | 1046119 |
12 | 3991913 |
13 | 15222986 |
14 | 58013678 |
15 | 220939711 |
16 | 840883777 |
17 | 3198349426 |
18 | 12157775958 |
19 | 46188298519 |
20 | 175376312729 |
21 | 665552754018 |
22 | 2524513742262 |
23 | 9571221986607 |
24 | 36271175050321 |
[1,2,6,23,89,338,1286,4911,18769,71722,273982, 1046119,3991913,15222986,58013678,220939711, 840883777,3198349426,12157775958,46188298519, 175376312729,665552754018,2524513742262, 9571221986607,36271175050321] |