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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 | 2 |
| 2 | 1 |
| 3 | 2 |
| 4 | 6 |
| 5 | 6 |
| 6 | 12 |
| 7 | 54 |
| 8 | 68 |
| 9 | 200 |
| 10 | 1266 |
| 11 | 2320 |
| 12 | 9256 |
| 13 | 81946 |
| 14 | 206828 |
| 15 | 1160264 |
| 16 | 14343496 |
| 17 | 50776328 |
| 18 | 396238264 |
| 19 | 6835424230 |
| 20 | 33707147400 |
| 21 | 367462965472 |
| 22 | 8846443274706 |
| 23 | 60917276216360 |
| 24 | 926358873081664 |
| 25 | 31121060447968362 |
| 26 | 298982889913216056 |
[1,2,1,2,6,6,12,54,68,200,1266,2320,9256,81946, 206828,1160264,14343496,50776328,396238264, 6835424230,33707147400,367462965472,8846443274706, 60917276216360,926358873081664,31121060447968362, 298982889913216056] |