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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 | 1 |
| 3 | 66 |
| 4 | 1348 |
| 5 | 15066 |
| 6 | 118158 |
| 7 | 731444 |
| 8 | 3813048 |
| 9 | 17413532 |
| 10 | 71497004 |
| 11 | 268726051 |
| 12 | 936836634 |
| 13 | 3059698312 |
| 14 | 9435007950 |
| 15 | 27642602449 |
| 16 | 77344108820 |
| 17 | 207567987387 |
| 18 | 536252189264 |
| 19 | 1337891704776 |
| 20 | 3232242731921 |
| 21 | 7579822554305 |
| 22 | 17290405684287 |
[0,1,66,1348,15066,118158,731444,3813048,17413532, 71497004,268726051,936836634,3059698312, 9435007950,27642602449,77344108820,207567987387, 536252189264,1337891704776,3232242731921, 7579822554305,17290405684287] |