| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 7 |
| 3 | 52 |
| 4 | 877 |
| 5 | 32502 |
| 6 | 2740627 |
| 7 | 507843752 |
| 8 | 214111484377 |
| 9 | 198376465625002 |
| 10 | 418186492923828127 |
| 11 | 1937270172119160156252 |
| 12 | 20419262349796295263671877 |
| 13 | 472966350615029335022460937502 |
| 14 | 24925857360591180741786959228515627 |
[1,2,7,52,877,32502,2740627,507843752, 214111484377,198376465625002,418186492923828127, 1937270172119160156252,20419262349796295263671877, 472966350615029335022460937502, 24925857360591180741786959228515627] |