This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 267 |
| 3 | 12910 |
| 4 | 368421 |
| 5 | 8632118 |
| 6 | 179716850 |
| 7 | 3325788157 |
| 8 | 54735436424 |
| 9 | 813247916326 |
| 10 | 11132424779200 |
| 11 | 142827255320422 |
| 12 | 1735129660080135 |
| 13 | 20034300716422826 |
| 14 | 219810810847095930 |
| 15 | 2288305542134926763 |