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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 7 |
| 4 | 37 |
| 5 | 241 |
| 6 | 1381 |
| 7 | 13231 |
| 8 | 140617 |
| 9 | 1483777 |
| 10 | 16211881 |
| 11 | 217551511 |
| 12 | 3384215341 |
| 13 | 50221272817 |
| 14 | 782154787597 |
| 15 | 13913712591871 |
| 16 | 272739557719441 |
| 17 | 5282625708305281 |
| 18 | 106588332600443857 |
| 19 | 2354480141600267047 |
| 20 | 56238135934525073461 |
| 21 | 1338131691952924913521 |
[1,1,1,7,37,241,1381,13231,140617,1483777, 16211881,217551511,3384215341,50221272817, 782154787597,13913712591871,272739557719441, 5282625708305281,106588332600443857, 2354480141600267047,56238135934525073461, 1338131691952924913521] |