| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 94 |
| 3 | 250 |
| 4 | 1468 |
| 5 | 8943 |
| 6 | 44018 |
| 7 | 242149 |
| 8 | 1355516 |
| 9 | 7364630 |
| 10 | 40388824 |
| 11 | 222974019 |
| 12 | 1225436161 |
| 13 | 6741965729 |
| 14 | 37150153393 |
| 15 | 204608197301 |
| 16 | 1127155820271 |
| 17 | 6212102723367 |
| 18 | 34238049347483 |
| 19 | 188724654726661 |
| 20 | 1040456205264741 |
[16,94,250,1468,8943,44018,242149,1355516,7364630, 40388824,222974019,1225436161,6741965729, 37150153393,204608197301,1127155820271, 6212102723367,34238049347483,188724654726661, 1040456205264741] |