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| n | a(n) |
|---|---|
| 5 | 42 |
| 6 | 1452 |
| 7 | 22689 |
| 8 | 245962 |
| 9 | 2149454 |
| 10 | 16290708 |
| 11 | 111709178 |
| 12 | 711996820 |
| 13 | 4292788212 |
| 14 | 24777783256 |
| 15 | 138077129921 |
| 16 | 747501664986 |
| 17 | 3949741123174 |
| 18 | 20444004524804 |
| 19 | 103955714523390 |
| 20 | 520494659493180 |
| 21 | 2570907398453580 |
| 22 | 12546842041060200 |
| 23 | 60579487688891610 |
| 24 | 289692893191143876 |
[42,1452,22689,245962,2149454,16290708,111709178, 711996820,4292788212,24777783256,138077129921, 747501664986,3949741123174,20444004524804, 103955714523390,520494659493180,2570907398453580, 12546842041060200,60579487688891610, 289692893191143876] |