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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 25 |
| 3 | 295 |
| 4 | 3113 |
| 5 | 33837 |
| 6 | 365740 |
| 7 | 3958594 |
| 8 | 42834071 |
| 9 | 463516595 |
| 10 | 5015744275 |
| 11 | 54275869563 |
| 12 | 587324222844 |
| 13 | 6355490845488 |
| 14 | 68773364113485 |
| 15 | 744203045653967 |
| 16 | 8053091185427477 |
| 17 | 87143257529984401 |
| 18 | 942985390024669100 |
[4,25,295,3113,33837,365740,3958594,42834071, 463516595,5015744275,54275869563,587324222844, 6355490845488,68773364113485,744203045653967, 8053091185427477,87143257529984401, 942985390024669100] |