The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3139 |
| 2 | 180325 |
| 3 | 2636263 |
| 4 | 19610233 |
| 5 | 97464799 |
| 6 | 370487485 |
| 7 | 1163205475 |
| 8 | 3164588407 |
| 9 | 7702189345 |
| 10 | 17148949027 |
| 11 | 35500063501 |
| 12 | 69161990275 |
| 13 | 128000343121 |
| 14 | 226698100687 |
| 15 | 386480229085 |
| 16 | 637265493637 |
| 17 | 1020310909975 |
| 18 | 1591418959705 |
| 19 | 2424782370859 |
| 20 | 3617545938373 |
| 21 | 5295169534843 |
[1,3139,180325,2636263,19610233,97464799, 370487485,1163205475,3164588407,7702189345, 17148949027,35500063501,69161990275,128000343121, 226698100687,386480229085,637265493637, 1020310909975,1591418959705,2424782370859, 3617545938373,5295169534843] |