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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 8 |
| 3 | 65 |
| 4 | 4168 |
| 5 | 2134081 |
| 6 | 69929570376 |
| 7 | 1173223506987487297 |
| 8 | 644986443956439734064225751112 |
| 9 | 5948949931338226254069168911286743617840154185793 |
| 10 | 30164759804754346385078845671118798583946045417223576862481934288047850387443784 |
[0,1,8,65,4168,2134081,69929570376, 1173223506987487297, 644986443956439734064225751112, 5948949931338226254069168911286743617840154185793, 30164759804754346385078845671118798583946045417223\ 576862481934288047850387443784] |