The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | 22 |
| 5 | 170 |
| 6 | 816 |
| 7 | 2947 |
| 8 | 8765 |
| 9 | 22703 |
| 10 | 52823 |
| 11 | 113042 |
| 12 | 225817 |
| 13 | 426299 |
| 14 | 766905 |
| 15 | 1324282 |
| 16 | 2206478 |
| 17 | 3563770 |
| 18 | 5599258 |
| 19 | 8584775 |
| 20 | 12875840 |
| 21 | 18934040 |
| 22 | 27347390 |
| 23 | 38860741 |
| 24 | 54402707 |
| 25 | 75125825 |
| 26 | 102441321 |
| 27 | 138070912 |
| 28 | 184090795 |
| 29 | 242997153 |
| 30 | 317760863 |
| 31 | 411908932 |
| 32 | 529591532 |
| 33 | 675681764 |
[1,22,170,816,2947,8765,22703,52823,113042,225817, 426299,766905,1324282,2206478,3563770,5599258, 8584775,12875840,18934040,27347390,38860741, 54402707,75125825,102441321,138070912,184090795, 242997153,317760863,411908932,529591532,675681764] |