n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 7 |
4 | 27 |
5 | 114 |
6 | 507 |
7 | 2342 |
8 | 11125 |
9 | 54002 |
10 | 266684 |
11 | 1335610 |
12 | 6767477 |
13 | 34629709 |
14 | 178701317 |
15 | 928903447 |
16 | 4859345882 |
17 | 25563551782 |
18 | 135153617840 |
19 | 717740916202 |
20 | 3826894116962 |
21 | 20478451476328 |
22 | 109945087353190 |
23 | 592048943478464 |
24 | 3196930550222605 |
25 | 17306392059508743 |
26 | 93905862139673832 |
[0,1,2,7,27,114,507,2342,11125,54002,266684, 1335610,6767477,34629709,178701317,928903447, 4859345882,25563551782,135153617840,717740916202, 3826894116962,20478451476328,109945087353190, 592048943478464,3196930550222605, 17306392059508743,93905862139673832] |