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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 24 |
| 3 | 110 |
| 4 | 412 |
| 5 | 1918 |
| 6 | 8708 |
| 7 | 39178 |
| 8 | 177032 |
| 9 | 787715 |
| 10 | 3506973 |
| 11 | 15792653 |
| 12 | 70939799 |
| 13 | 317938418 |
| 14 | 1427686705 |
| 15 | 6389256951 |
| 16 | 28533745889 |
[5,24,110,412,1918,8708,39178,177032,787715, 3506973,15792653,70939799,317938418,1427686705, 6389256951,28533745889] |