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| n | a(n) |
|---|---|
| 1 | 64 |
| 2 | 1080 |
| 3 | 38512 |
| 4 | 899390 |
| 5 | 22520656 |
| 6 | 462313688 |
| 7 | 9567328752 |
| 8 | 178464221290 |
| 9 | 3336648010448 |
| 10 | 58641450033936 |
| 11 | 1033599371410096 |
| 12 | 17499076161248060 |
| 13 | 297470720803662048 |
| 14 | 4917593684170711306 |
| 15 | 81699455573347788176 |
[64,1080,38512,899390,22520656,462313688, 9567328752,178464221290,3336648010448, 58641450033936,1033599371410096,17499076161248060, 297470720803662048,4917593684170711306, 81699455573347788176] |