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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 28 |
| 2 | 503 |
| 3 | 7418 |
| 4 | 98169 |
| 5 | 1217136 |
| 6 | 14481211 |
| 7 | 167749366 |
| 8 | 1909343117 |
| 9 | 21481183724 |
| 10 | 239821188399 |
| 11 | 2663810246994 |
| 12 | 29488849731745 |
| 13 | 325724954017192 |
| 14 | 3592642298586467 |
| 15 | 39588148322702702 |
| 16 | 435961667557278453 |
[1,28,503,7418,98169,1217136,14481211,167749366, 1909343117,21481183724,239821188399,2663810246994, 29488849731745,325724954017192,3592642298586467, 39588148322702702,435961667557278453] |