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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 3 |
| 4 | 45 |
| 5 | 3 |
| 6 | 381 |
| 7 | 2349 |
| 8 | 115329357 |
| 9 | 10279641655875 |
| 10 | 5033685952807971 |
| 11 | 5263826472436016979 |
| 12 | 898670952308059000662208200339860406351380028634597445743368513219427297854627 |
| 13 | 1163046333059983884005407440923089001865672520479660324278034104804471332063117356524700189 |
[1,3,3,45,3,381,2349,115329357,10279641655875, 5033685952807971,5263826472436016979, 89867095230805900066220820033986040635138002863459\ 7445743368513219427297854627, 11630463330599838840054074409230890018656725204796\ 60324278034104804471332063117356524700189] |