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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 7 |
| 4 | 13 |
| 5 | 20 |
| 6 | 113 |
| 7 | 133 |
| 8 | 7827 |
| 9 | 7960 |
| 10 | 47627 |
| 11 | 55587 |
| 12 | 103214 |
| 13 | 158801 |
| 14 | 897219 |
| 15 | 1056020 |
| 16 | 62146379 |
| 17 | 63202399 |
| 18 | 378158374 |
| 19 | 441360773 |
| 20 | 819519147 |
| 21 | 1260879920 |
| 22 | 7123918747 |
| 23 | 8384798667 |
| 24 | 493442241433 |
| 25 | 501827040100 |
| 26 | 3002577441933 |
| 27 | 3504404482033 |
| 28 | 6506981923966 |
[1,1,6,7,13,20,113,133,7827,7960,47627,55587, 103214,158801,897219,1056020,62146379,63202399, 378158374,441360773,819519147,1260879920, 7123918747,8384798667,493442241433,501827040100, 3002577441933,3504404482033,6506981923966] |