| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 19 |
| 3 | 60 |
| 4 | 190 |
| 5 | 602 |
| 6 | 1908 |
| 7 | 6048 |
| 8 | 19172 |
| 9 | 60776 |
| 10 | 192664 |
| 11 | 610760 |
| 12 | 1936160 |
| 13 | 6137792 |
| 14 | 19457328 |
| 15 | 61681408 |
| 16 | 195535392 |
| 17 | 619864096 |
| 18 | 1965022784 |
| 19 | 6229292160 |
| 20 | 19747394880 |
| 21 | 62600949632 |
| 22 | 198450424448 |
| 23 | 629105008768 |
| 24 | 1994317286912 |
| 25 | 6322158281216 |
[6,19,60,190,602,1908,6048,19172,60776,192664, 610760,1936160,6137792,19457328,61681408, 195535392,619864096,1965022784,6229292160, 19747394880,62600949632,198450424448,629105008768, 1994317286912,6322158281216] |