| n | a(n) |
|---|---|
| 1 | 49 |
| 2 | 188 |
| 3 | 790 |
| 4 | 3537 |
| 5 | 16477 |
| 6 | 78614 |
| 7 | 380407 |
| 8 | 1855983 |
| 9 | 9098538 |
| 10 | 44726540 |
| 11 | 220215471 |
| 12 | 1085242000 |
| 13 | 5350977611 |
| 14 | 26391893977 |
| 15 | 130191662653 |
| 16 | 642301565508 |
| 17 | 3168980716083 |
| 18 | 15635596759403 |
| 19 | 77146727890806 |
| 20 | 380649496885405 |
[49,188,790,3537,16477,78614,380407,1855983, 9098538,44726540,220215471,1085242000,5350977611, 26391893977,130191662653,642301565508, 3168980716083,15635596759403,77146727890806, 380649496885405] |