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| n | a(n) |
|---|---|
| 1 | 39 |
| 2 | 311 |
| 3 | 2715 |
| 4 | 21639 |
| 5 | 133532 |
| 6 | 706994 |
| 7 | 3457755 |
| 8 | 16257008 |
| 9 | 72992744 |
| 10 | 309583532 |
| 11 | 1229822682 |
| 12 | 4620454491 |
| 13 | 16559895238 |
| 14 | 56785677343 |
| 15 | 186875868230 |
[39,311,2715,21639,133532,706994,3457755,16257008, 72992744,309583532,1229822682,4620454491, 16559895238,56785677343,186875868230] |