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| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 966 |
| 3 | 33247 |
| 4 | 1191846 |
| 5 | 42415575 |
| 6 | 1509240923 |
| 7 | 53692543412 |
| 8 | 1910141303899 |
| 9 | 67952729355483 |
| 10 | 2417392485157080 |
| 11 | 85997620546017880 |
| 12 | 3059323896869473363 |
| 13 | 108833942883495398598 |
| 14 | 3871713631294308702400 |
[21,966,33247,1191846,42415575,1509240923, 53692543412,1910141303899,67952729355483, 2417392485157080,85997620546017880, 3059323896869473363,108833942883495398598, 3871713631294308702400] |