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) |
|---|---|
| 2 | 1 |
| 3 | 498 |
| 4 | 26499 |
| 5 | 1475286 |
| 6 | 100766213 |
| 7 | 6523266332 |
| 8 | 418172485806 |
| 9 | 26971800950170 |
| 10 | 1738936046774850 |
| 11 | 112060168171247368 |
| 12 | 7222422644817870197 |
| 13 | 465494892350086836970 |
| 14 | 30001329862709920944426 |
| 15 | 1933604967243463575726934 |
| 16 | 124622105764386987040047037 |
| 17 | 8031972575008760516889720476 |