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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 | 3 |
| 2 | 12 |
| 3 | 50 |
| 4 | 211 |
| 5 | 894 |
| 6 | 3791 |
| 7 | 16068 |
| 8 | 68032 |
| 9 | 287675 |
| 10 | 1214761 |
| 11 | 5122428 |
| 12 | 21571028 |
| 13 | 90718913 |
| 14 | 381050570 |
| 15 | 1598645263 |
| 16 | 6699355413 |
| 17 | 28044720813 |
| 18 | 117281866330 |
| 19 | 489999068614 |
| 20 | 2045341248508 |
| 21 | 8530263939665 |
| 22 | 35547083083270 |
| 23 | 148015639243691 |
| 24 | 615870619714675 |
| 25 | 2560734764460360 |
[1,3,12,50,211,894,3791,16068,68032,287675, 1214761,5122428,21571028,90718913,381050570, 1598645263,6699355413,28044720813,117281866330, 489999068614,2045341248508,8530263939665, 35547083083270,148015639243691,615870619714675, 2560734764460360] |