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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 50 |
| 3 | 148 |
| 4 | 599 |
| 5 | 2354 |
| 6 | 9415 |
| 7 | 38558 |
| 8 | 158994 |
| 9 | 657238 |
| 10 | 2721509 |
| 11 | 11274883 |
| 12 | 46736042 |
| 13 | 193836729 |
| 14 | 804279754 |
| 15 | 3338261393 |
| 16 | 13859019181 |
| 17 | 57545314726 |
| 18 | 238962743161 |
| 19 | 992381007429 |
| 20 | 4121406272689 |
| 21 | 17116902820124 |
| 22 | 71090859437426 |
[8,50,148,599,2354,9415,38558,158994,657238, 2721509,11274883,46736042,193836729,804279754, 3338261393,13859019181,57545314726,238962743161, 992381007429,4121406272689,17116902820124, 71090859437426] |