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| n | a(n) |
|---|---|
| 1 | 64 |
| 2 | 422 |
| 3 | 4508 |
| 4 | 52411 |
| 5 | 678660 |
| 6 | 8887871 |
| 7 | 114873933 |
| 8 | 1472320155 |
| 9 | 18811450866 |
| 10 | 240333888755 |
| 11 | 3072777642636 |
| 12 | 39304807956686 |
| 13 | 502807539383400 |
| 14 | 6431904732538361 |
| 15 | 82273333965692552 |
| 16 | 1052378549019652099 |
[64,422,4508,52411,678660,8887871,114873933, 1472320155,18811450866,240333888755,3072777642636, 39304807956686,502807539383400,6431904732538361, 82273333965692552,1052378549019652099] |