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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 | 41 |
| 3 | 126 |
| 4 | 1526 |
| 5 | 5185 |
| 6 | 46920 |
| 7 | 176865 |
| 8 | 1254608 |
| 9 | 4986548 |
| 10 | 30563031 |
| 11 | 123868761 |
| 12 | 683127011 |
| 13 | 2793828323 |
| 14 | 14223836013 |
| 15 | 58127497582 |
| 16 | 278433541834 |
| 17 | 1130954381904 |
| 18 | 5159127957638 |
| 19 | 20767403083249 |
| 20 | 91032595281699 |
| 21 | 362455763000997 |
| 22 | 1536849042738162 |
[1,1,41,126,1526,5185,46920,176865,1254608, 4986548,30563031,123868761,683127011,2793828323, 14223836013,58127497582,278433541834, 1130954381904,5159127957638,20767403083249, 91032595281699,362455763000997,1536849042738162] |