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| n | a(n) |
|---|---|
| 1 | 20 |
| 2 | 2433 |
| 3 | 82320 |
| 4 | 2883000 |
| 5 | 100692120 |
| 6 | 3510873720 |
| 7 | 122511965400 |
| 8 | 4273149243000 |
| 9 | 149059992633720 |
| 10 | 5199524649003000 |
| 11 | 181370629635282360 |
| 12 | 6326611100912309880 |
| 13 | 220686102418837715640 |
| 14 | 7698019468039834665720 |
| 15 | 268523926123551652847160 |
[20,2433,82320,2883000,100692120,3510873720, 122511965400,4273149243000,149059992633720, 5199524649003000,181370629635282360, 6326611100912309880,220686102418837715640, 7698019468039834665720,268523926123551652847160] |