| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 44 |
| 3 | 116 |
| 4 | 284 |
| 5 | 696 |
| 6 | 1672 |
| 7 | 3996 |
| 8 | 9580 |
| 9 | 22656 |
| 10 | 54456 |
| 11 | 128292 |
| 12 | 309676 |
| 13 | 729304 |
| 14 | 1768840 |
| 15 | 4171516 |
| 16 | 10165276 |
| 17 | 24024384 |
| 18 | 58797992 |
| 19 | 139284836 |
| 20 | 342197820 |
| 21 | 812420344 |
| 22 | 2002527128 |
| 23 | 4763655900 |
| 24 | 11774209164 |
| 25 | 28056237376 |
| 26 | 69503351704 |
[16,44,116,284,696,1672,3996,9580,22656,54456, 128292,309676,729304,1768840,4171516,10165276, 24024384,58797992,139284836,342197820,812420344, 2002527128,4763655900,11774209164,28056237376, 69503351704] |