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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 1441 |
| 4 | 22624 |
| 5 | 253690 |
| 6 | 1324160 |
| 7 | 6962675 |
| 8 | 24325376 |
| 9 | 80776164 |
| 10 | 225474240 |
| 11 | 601191285 |
| 12 | 1366506400 |
| 13 | 3152419966 |
| 14 | 6455003584 |
| 15 | 12902747495 |
| 16 | 24381528320 |
| 17 | 45355096520 |
| 18 | 78794712576 |
| 19 | 137109487689 |
| 20 | 225795051360 |
| 21 | 369875389570 |
[0,0,1441,22624,253690,1324160,6962675,24325376, 80776164,225474240,601191285,1366506400, 3152419966,6455003584,12902747495,24381528320, 45355096520,78794712576,137109487689,225795051360, 369875389570] |