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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 | 2 |
| 3 | 6 |
| 4 | 24 |
| 5 | 114 |
| 6 | 608 |
| 7 | 3554 |
| 8 | 22480 |
| 9 | 152546 |
| 10 | 1103200 |
| 11 | 8456994 |
| 12 | 68411632 |
| 13 | 581745250 |
| 14 | 5183126016 |
| 15 | 48245682338 |
| 16 | 467988498064 |
| 17 | 4720072211938 |
| 18 | 49400302118560 |
| 19 | 535546012710434 |
| 20 | 6004045485933104 |
| 21 | 69507152958422370 |
| 22 | 829789019700511040 |
| 23 | 10202854323325253538 |
| 24 | 129061753086335478736 |
[1,1,2,6,24,114,608,3554,22480,152546,1103200, 8456994,68411632,581745250,5183126016,48245682338, 467988498064,4720072211938,49400302118560, 535546012710434,6004045485933104, 69507152958422370,829789019700511040, 10202854323325253538,129061753086335478736] |