n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 25 |
5 | 114 |
6 | 591 |
7 | 3298 |
8 | 19532 |
9 | 120687 |
10 | 771373 |
11 | 5061741 |
12 | 33943662 |
13 | 231751331 |
14 | 1606587482 |
15 | 11283944502 |
16 | 80157645245 |
17 | 575105238243 |
18 | 4162624144308 |
19 | 30365913761136 |
20 | 223075674659696 |
21 | 1649166676341180 |
22 | 12262121068089094 |
23 | 91649977839972636 |
24 | 688288656744067230 |
[1,2,6,25,114,591,3298,19532,120687,771373, 5061741,33943662,231751331,1606587482,11283944502, 80157645245,575105238243,4162624144308, 30365913761136,223075674659696,1649166676341180, 12262121068089094,91649977839972636, 688288656744067230] |