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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 60 |
| 2 | 3601 |
| 3 | 216120 |
| 4 | 12970801 |
| 5 | 778464180 |
| 6 | 46720821601 |
| 7 | 2804027760240 |
| 8 | 168288386436001 |
| 9 | 10100107213920300 |
| 10 | 606174721221654001 |
| 11 | 36380583380513160360 |
| 12 | 2183441177552011275601 |
| 13 | 131042851236501189696420 |
| 14 | 7864754515367623393060801 |
| 15 | 472016313773293904773344480 |
[1,60,3601,216120,12970801,778464180,46720821601, 2804027760240,168288386436001,10100107213920300, 606174721221654001,36380583380513160360, 2183441177552011275601,131042851236501189696420, 7864754515367623393060801, 472016313773293904773344480] |