The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 5 |
| 4 | 14 |
| 5 | 55 |
| 6 | 91 |
| 7 | 204 |
| 8 | 285 |
| 9 | 506 |
| 10 | 1015 |
| 11 | 1240 |
| 12 | 2109 |
| 13 | 2870 |
| 14 | 3311 |
| 15 | 4324 |
| 16 | 6201 |
| 17 | 8555 |
| 18 | 9455 |
| 19 | 12529 |
| 20 | 14910 |
| 21 | 16206 |
| 22 | 20540 |
| 23 | 23821 |
| 24 | 29370 |
| 25 | 38024 |
| 26 | 42925 |
| 27 | 45526 |
| 28 | 51039 |
| 29 | 53955 |
| 30 | 60116 |
| 31 | 85344 |
| 32 | 93665 |
| 33 | 107134 |
| 34 | 111895 |
| 35 | 137825 |
| 36 | 143450 |
| 37 | 161239 |
| 38 | 180441 |
| 39 | 194054 |
[1,5,14,55,91,204,285,506,1015,1240,2109,2870, 3311,4324,6201,8555,9455,12529,14910,16206,20540, 23821,29370,38024,42925,45526,51039,53955,60116, 85344,93665,107134,111895,137825,143450,161239, 180441,194054] |