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| n | a(n) |
|---|---|
| 1 | 400 |
| 2 | 75 |
| 3 | 849 |
| 4 | 4995 |
| 5 | 38457 |
| 6 | 261819 |
| 7 | 1881441 |
| 8 | 13196979 |
| 9 | 93567177 |
| 10 | 660226923 |
| 11 | 4668616305 |
| 12 | 32981553891 |
| 13 | 233097416793 |
| 14 | 1647108262683 |
| 15 | 11639737522305 |
| 16 | 82252298336787 |
| 17 | 581246168781033 |
| 18 | 4107418513432011 |
| 19 | 29025468445135761 |
[400,75,849,4995,38457,261819,1881441,13196979, 93567177,660226923,4668616305,32981553891, 233097416793,1647108262683,11639737522305, 82252298336787,581246168781033,4107418513432011, 29025468445135761] |