n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 21 |
5 | 73 |
6 | 272 |
7 | 1055 |
8 | 4226 |
9 | 17296 |
10 | 72002 |
11 | 304223 |
12 | 1302487 |
13 | 5631257 |
14 | 24557910 |
15 | 107912037 |
16 | 477269006 |
17 | 2122877159 |
18 | 9489677428 |
19 | 42608326043 |
20 | 192070741414 |
21 | 868890650080 |
22 | 3943246247910 |
23 | 17947364156580 |
24 | 81901112293463 |
25 | 374647230094154 |
26 | 1717560685555588 |
27 | 7890073413521769 |
28 | 36312976830040510 |
[1,1,2,6,21,73,272,1055,4226,17296,72002,304223, 1302487,5631257,24557910,107912037,477269006, 2122877159,9489677428,42608326043,192070741414, 868890650080,3943246247910,17947364156580, 81901112293463,374647230094154,1717560685555588, 7890073413521769,36312976830040510] |