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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 30 |
| 3 | 834 |
| 4 | 34120 |
| 5 | 1846970 |
| 6 | 124495056 |
| 7 | 10047807546 |
| 8 | 944801560704 |
| 9 | 101438766492282 |
| 10 | 12244506725818400 |
| 11 | 1641472208008246548 |
| 12 | 241972783517997222912 |
| 13 | 38901934135879029948980 |
| 14 | 6774014909661031663285760 |
| 15 | 1270083656346147360159806250 |
| 16 | 255106807553373977988264132608 |
[1,2,30,834,34120,1846970,124495056,10047807546, 944801560704,101438766492282,12244506725818400, 1641472208008246548,241972783517997222912, 38901934135879029948980,6774014909661031663285760, 1270083656346147360159806250, 255106807553373977988264132608] |