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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 | 4 |
| 3 | 48 |
| 4 | 466 |
| 5 | 5100 |
| 6 | 74675 |
| 7 | 1276012 |
| 8 | 30240388 |
| 9 | 1056360518 |
| 10 | 50037661325 |
| 11 | 3406737828874 |
| 12 | 353272517327686 |
| 13 | 52791942245108114 |
[0,4,48,466,5100,74675,1276012,30240388, 1056360518,50037661325,3406737828874, 353272517327686,52791942245108114] |