The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 11 | 1 |
| 12 | 1 |
| 13 | 7 |
| 14 | 39 |
| 15 | 189 |
| 16 | 832 |
| 17 | 3415 |
| 18 | 13289 |
| 19 | 49594 |
| 20 | 178972 |
| 21 | 628397 |
| 22 | 2156842 |
| 23 | 7263306 |
| 24 | 24068685 |
| 25 | 78667879 |
| 26 | 254101597 |
| 27 | 812408511 |
| 28 | 2574398860 |
| 29 | 8094625175 |
| 30 | 25278311063 |
| 31 | 78465711029 |
| 32 | 242265995076 |
| 33 | 744465052503 |
| 34 | 2278029840583 |
| 35 | 6944364119469 |
| 36 | 21097626446747 |
| 37 | 63901611553272 |
[1,1,7,39,189,832,3415,13289,49594,178972,628397, 2156842,7263306,24068685,78667879,254101597, 812408511,2574398860,8094625175,25278311063, 78465711029,242265995076,744465052503, 2278029840583,6944364119469,21097626446747, 63901611553272] |