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| n | a(n) |
|---|---|
| 1 | 25 |
| 2 | 156 |
| 3 | 1024 |
| 4 | 5778 |
| 5 | 28900 |
| 6 | 155496 |
| 7 | 863041 |
| 8 | 4712418 |
| 9 | 25553025 |
| 10 | 138835035 |
| 11 | 755645121 |
| 12 | 4112506265 |
| 13 | 22371783184 |
| 14 | 121697641615 |
| 15 | 662076769761 |
| 16 | 3601973220144 |
| 17 | 19595814544656 |
| 18 | 106606560821538 |
| 19 | 579971141108100 |
[25,156,1024,5778,28900,155496,863041,4712418, 25553025,138835035,755645121,4112506265, 22371783184,121697641615,662076769761, 3601973220144,19595814544656,106606560821538, 579971141108100] |