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| n | a(n) |
|---|---|
| 1 | 80 |
| 2 | 432 |
| 3 | 2368 |
| 4 | 13056 |
| 5 | 71936 |
| 6 | 397056 |
| 7 | 2188288 |
| 8 | 12079104 |
| 9 | 66572288 |
| 10 | 367472640 |
| 11 | 2025275392 |
| 12 | 11179327488 |
| 13 | 61613342720 |
| 14 | 340099792896 |
| 15 | 1874413748224 |
| 16 | 10346585653248 |
| 17 | 57023799492608 |
| 18 | 314765950844928 |
| 19 | 1734789723848704 |
[80,432,2368,13056,71936,397056,2188288,12079104, 66572288,367472640,2025275392,11179327488, 61613342720,340099792896,1874413748224, 10346585653248,57023799492608,314765950844928, 1734789723848704] |