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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 65 |
| 3 | 19812 |
| 4 | 16836458 |
| 5 | 30584805344 |
| 6 | 101712712528352 |
| 7 | 559155681922806328 |
| 8 | 4726278437746021089208 |
| 9 | 58187531579876705928027712 |
| 10 | 1000523517685151396828602120640 |
| 11 | 23235157037192774575979788565151104 |
| 12 | 709057406693306876515431403267191583808 |
[1,1,65,19812,16836458,30584805344, 101712712528352,559155681922806328, 4726278437746021089208,58187531579876705928027712, 1000523517685151396828602120640, 23235157037192774575979788565151104, 709057406693306876515431403267191583808] |