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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 10 |
| 4 | 74 |
| 5 | 682 |
| 6 | 7274 |
| 7 | 86386 |
| 8 | 1116338 |
| 9 | 15464818 |
| 10 | 227315378 |
| 11 | 3519165370 |
| 12 | 57067589306 |
| 13 | 965272138714 |
| 14 | 16974057490010 |
| 15 | 309490272908386 |
| 16 | 5838392491816418 |
| 17 | 113747315349651298 |
| 18 | 2285212240930687202 |
[1,2,10,74,682,7274,86386,1116338,15464818, 227315378,3519165370,57067589306,965272138714, 16974057490010,309490272908386,5838392491816418, 113747315349651298,2285212240930687202] |