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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 8 |
| 3 | 204 |
| 4 | 8656 |
| 5 | 514100 |
| 6 | 39254904 |
| 7 | 3663341724 |
| 8 | 404021632928 |
| 9 | 51413304278916 |
| 10 | 7414832746025800 |
| 11 | 1195170934203398636 |
| 12 | 212923233266007511152 |
| 13 | 41545466670049713766356 |
| 14 | 8811212141812890158250776 |
| 15 | 2018230889016461893216938300 |
| 16 | 496523506149784085749952075584 |
| 17 | 130578628540561635331879674437156 |
[1,8,204,8656,514100,39254904,3663341724, 404021632928,51413304278916,7414832746025800, 1195170934203398636,212923233266007511152, 41545466670049713766356,8811212141812890158250776, 2018230889016461893216938300, 496523506149784085749952075584, 130578628540561635331879674437156] |