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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 236 |
| 3 | 6243 |
| 4 | 144072 |
| 5 | 3441754 |
| 6 | 82403876 |
| 7 | 1969988474 |
| 8 | 47097894761 |
| 9 | 1126027901118 |
| 10 | 26921354166636 |
| 11 | 643642170624112 |
| 12 | 15388350262653390 |
| 13 | 367908346302801018 |
| 14 | 8796040464090891020 |
| 15 | 210297832442919242608 |
| 16 | 5027850714800357439307 |
[3,236,6243,144072,3441754,82403876,1969988474, 47097894761,1126027901118,26921354166636, 643642170624112,15388350262653390, 367908346302801018,8796040464090891020, 210297832442919242608,5027850714800357439307] |