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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 50 |
| 3 | 4116 |
| 4 | 1646568 |
| 5 | 3184461423 |
| 6 | 29706808370096 |
| 7 | 1335119245893326400 |
| 8 | 288882990167192721013376 |
| 9 | 300792059519113653077154558000 |
| 10 | 1506680146887473588202049621593937500 |
| 11 | 36298820709557430183399305000196605531250000 |
| 12 | 4205446372314569673006362329181090368935937500000000 |
| 13 | 2342761095072644391194625697884219372917666852341417500000000 |
[1,3,50,4116,1646568,3184461423,29706808370096, 1335119245893326400,288882990167192721013376, 300792059519113653077154558000, 1506680146887473588202049621593937500, 36298820709557430183399305000196605531250000, 42054463723145696730063623291810903689359375000000\ 00, 23427610950726443911946256978842193729176668523414\ 17500000000] |