n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 7 |
3 | 26 |
4 | 86 |
5 | 318 |
6 | 1165 |
7 | 4312 |
8 | 16318 |
9 | 62020 |
10 | 238165 |
11 | 921980 |
12 | 3590145 |
13 | 14067188 |
14 | 55399442 |
15 | 219172028 |
16 | 870736366 |
17 | 3472155062 |
18 | 13892694747 |
19 | 55759406580 |
20 | 224427809830 |
21 | 905659181212 |
22 | 3663475842865 |
23 | 14851965523630 |
24 | 60334690089827 |
25 | 245572722474460 |
26 | 1001306332164918 |
[1,2,7,26,86,318,1165,4312,16318,62020,238165, 921980,3590145,14067188,55399442,219172028, 870736366,3472155062,13892694747,55759406580, 224427809830,905659181212,3663475842865, 14851965523630,60334690089827,245572722474460, 1001306332164918] |