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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 3 |
| 3 | 8 |
| 4 | 11 |
| 5 | 19 |
| 6 | 87 |
| 7 | 193 |
| 8 | 280 |
| 9 | 473 |
| 10 | 6429 |
| 11 | 64763 |
| 12 | 71192 |
| 13 | 491915 |
| 14 | 563107 |
| 15 | 6122985 |
| 16 | 80161912 |
| 17 | 86284897 |
| 18 | 166446809 |
| 19 | 419178515 |
| 20 | 1843160869 |
| 21 | 2262339384 |
| 22 | 4105500253 |
| 23 | 10473339890 |
| 24 | 14578840143 |
| 25 | 39631020176 |
| 26 | 2154653929647 |
| 27 | 4348938879470 |
| 28 | 6503592809117 |
[1,2,3,8,11,19,87,193,280,473,6429,64763,71192, 491915,563107,6122985,80161912,86284897,166446809, 419178515,1843160869,2262339384,4105500253, 10473339890,14578840143,39631020176,2154653929647, 4348938879470,6503592809117] |