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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 16 |
| 4 | 142 |
| 5 | 2832 |
| 6 | 250472 |
| 7 | 46559350 |
| 8 | 70028916760 |
| 9 | 424743527181996 |
| 10 | 5415473412421080256 |
[1,4,16,142,2832,250472,46559350,70028916760, 424743527181996,5415473412421080256] |