| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 43 |
| 3 | 206 |
| 4 | 1097 |
| 5 | 5675 |
| 6 | 29433 |
| 7 | 153037 |
| 8 | 794716 |
| 9 | 4128244 |
| 10 | 21444844 |
| 11 | 111394775 |
| 12 | 578646848 |
| 13 | 3005807582 |
| 14 | 15613798271 |
| 15 | 81106596833 |
| 16 | 421311892656 |
| 17 | 2188523765507 |
| 18 | 11368386235590 |
| 19 | 59053598944793 |
| 20 | 306756604030647 |
| 21 | 1593461123288541 |
[8,43,206,1097,5675,29433,153037,794716,4128244, 21444844,111394775,578646848,3005807582, 15613798271,81106596833,421311892656, 2188523765507,11368386235590,59053598944793, 306756604030647,1593461123288541] |