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| n | a(n) |
|---|---|
| 0 | 20 |
| 1 | 21 |
| 2 | 62 |
| 3 | 269 |
| 4 | 331 |
| 5 | 1924 |
| 6 | 19571 |
| 7 | 99779 |
| 8 | 119350 |
| 9 | 577179 |
| 10 | 1273708 |
| 11 | 1850887 |
| 12 | 75309188 |
| 13 | 77160075 |
| 14 | 229629338 |
| 15 | 995677427 |
| 16 | 1225306765 |
| 17 | 7122211252 |
| 18 | 72447419285 |
| 19 | 369359307677 |
| 20 | 441806726962 |
| 21 | 2136586215525 |
[20,21,62,269,331,1924,19571,99779,119350,577179, 1273708,1850887,75309188,77160075,229629338, 995677427,1225306765,7122211252,72447419285, 369359307677,441806726962,2136586215525] |