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| n | a(n) |
|---|---|
| 0 | 19 |
| 1 | 20 |
| 2 | 39 |
| 3 | 215 |
| 4 | 2619 |
| 5 | 2834 |
| 6 | 16789 |
| 7 | 19623 |
| 8 | 36412 |
| 9 | 92447 |
| 10 | 313753 |
| 11 | 406200 |
| 12 | 7625353 |
| 13 | 8031553 |
| 14 | 31720012 |
| 15 | 71471577 |
| 16 | 103191589 |
| 17 | 174663166 |
| 18 | 976507419 |
| 19 | 1151170585 |
| 20 | 14790554439 |
| 21 | 75103942780 |
| 22 | 89894497219 |
[19,20,39,215,2619,2834,16789,19623,36412,92447, 313753,406200,7625353,8031553,31720012,71471577, 103191589,174663166,976507419,1151170585, 14790554439,75103942780,89894497219] |