| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 22 |
| 2 | 64 |
| 3 | 148 |
| 4 | 396 |
| 5 | 1052 |
| 6 | 2878 |
| 7 | 7946 |
| 8 | 22180 |
| 9 | 62356 |
| 10 | 176394 |
| 11 | 501446 |
| 12 | 1431426 |
| 13 | 4100482 |
| 14 | 11781736 |
| 15 | 33940508 |
| 16 | 97999060 |
| 17 | 283533332 |
| 18 | 821804362 |
| 19 | 2385796886 |
| 20 | 6936333286 |
| 21 | 20192890166 |
| 22 | 58855587316 |
| 23 | 171732657416 |
| 24 | 501596968522 |
[1,22,64,148,396,1052,2878,7946,22180,62356, 176394,501446,1431426,4100482,11781736,33940508, 97999060,283533332,821804362,2385796886, 6936333286,20192890166,58855587316,171732657416, 501596968522] |