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A024249 as a simple table
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 4 |
| 3 | 24 |
| 4 | 192 |
| 5 | 9472 |
| 6 | 1182208 |
| 7 | 135668736 |
| 8 | 14993473536 |
| 9 | 1702145425408 |
| 10 | 212302947942400 |
| 11 | 32402586267549696 |
| 12 | 6715751146400514048 |
| 13 | 1845064263947813650432 |
| 14 | 597912413872386432040960 |
[0,1,4,24,192,9472,1182208,135668736,14993473536, 1702145425408,212302947942400,32402586267549696, 6715751146400514048,1845064263947813650432, 597912413872386432040960] |