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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 | 10 |
| 2 | 65 |
| 3 | 340 |
| 4 | 1555 |
| 5 | 6482 |
| 6 | 25235 |
| 7 | 93200 |
| 8 | 330070 |
| 9 | 1129580 |
| 10 | 3756950 |
| 11 | 12197320 |
| 12 | 38787770 |
| 13 | 121148300 |
| 14 | 372476410 |
| 15 | 1129367632 |
| 16 | 3382133695 |
| 17 | 10016694470 |
| 18 | 29370557375 |
| 19 | 85341915260 |
| 20 | 245939376949 |
| 21 | 703423066190 |
[1,10,65,340,1555,6482,25235,93200,330070,1129580, 3756950,12197320,38787770,121148300,372476410, 1129367632,3382133695,10016694470,29370557375, 85341915260,245939376949,703423066190] |