| n | a(n) |
|---|---|
| 1 | 2727 |
| 2 | 6681 |
| 3 | 16878 |
| 4 | 43050 |
| 5 | 109995 |
| 6 | 280255 |
| 7 | 709626 |
| 8 | 1780062 |
| 9 | 4409127 |
| 10 | 10965130 |
| 11 | 27408735 |
| 12 | 68729661 |
| 13 | 172613504 |
| 14 | 433687965 |
| 15 | 1089178972 |
| 16 | 2732863735 |
| 17 | 6849615759 |
| 18 | 17159775343 |
| 19 | 42994448177 |
| 20 | 107761756345 |
| 21 | 270179147077 |
| 22 | 677511074112 |
[2727,6681,16878,43050,109995,280255,709626, 1780062,4409127,10965130,27408735,68729661, 172613504,433687965,1089178972,2732863735, 6849615759,17159775343,42994448177,107761756345, 270179147077,677511074112] |