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| n | a(n) |
|---|---|
| 6 | 1216 |
| 7 | 19312 |
| 8 | 467696 |
| 9 | 15608288 |
| 10 | 678914816 |
| 11 | 37083546112 |
| 12 | 2475764410944 |
| 13 | 197890932247680 |
| 14 | 18629724957708800 |
| 15 | 2038137238577944576 |
| 16 | 256240757035057154048 |
| 17 | 36670707901174666768384 |
| 18 | 5924904192825339158446080 |
| 19 | 1073049649261575998090559488 |
[1216,19312,467696,15608288,678914816,37083546112, 2475764410944,197890932247680,18629724957708800, 2038137238577944576,256240757035057154048, 36670707901174666768384,5924904192825339158446080, 1073049649261575998090559488] |