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| n | a(n) |
|---|---|
| 2 | 16 |
| 3 | 240 |
| 4 | 6448 |
| 5 | 187184 |
| 6 | 5474096 |
| 7 | 160196400 |
| 8 | 4688357168 |
| 9 | 137211717424 |
| 10 | 4015706384176 |
| 11 | 117525666899760 |
| 12 | 3439564830058288 |
| 13 | 100664021209884464 |
| 14 | 2946083492311639856 |
| 15 | 86221550057181718320 |
| 16 | 2523402922444883797808 |
| 17 | 73851169513661744064304 |
[16,240,6448,187184,5474096,160196400,4688357168, 137211717424,4015706384176,117525666899760, 3439564830058288,100664021209884464, 2946083492311639856,86221550057181718320, 2523402922444883797808,73851169513661744064304] |