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| n | a(n) |
|---|---|
| 1 | 15 |
| 2 | 77 |
| 3 | 99 |
| 4 | 240 |
| 5 | 354 |
| 6 | 18870 |
| 7 | 284481 |
| 8 | 302174 |
| 9 | 433197 |
| 10 | 440973 |
| 11 | 453086 |
| 12 | 2446619 |
| 13 | 5776855 |
| 14 | 9961111 |
| 15 | 17986255 |
| 16 | 19091527 |
| 17 | 28997648 |
| 18 | 37443680 |
| 19 | 40074848 |
| 20 | 47602448 |
| 21 | 67166528 |
| 22 | 129389763 |
| 23 | 141963648 |
| 24 | 146259296 |
| 25 | 152062688 |
| 26 | 202038871 |
| 27 | 203444576 |
[15,77,99,240,354,18870,284481,302174,433197, 440973,453086,2446619,5776855,9961111,17986255, 19091527,28997648,37443680,40074848,47602448, 67166528,129389763,141963648,146259296,152062688, 202038871,203444576] |