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) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 37 |
| 3 | 847 |
| 4 | 28401 |
| 5 | 1256651 |
| 6 | 69125869 |
| 7 | 4548342975 |
| 8 | 348434664769 |
| 9 | 30463322582899 |
| 10 | 2993348092318101 |
| 11 | 326572612514776079 |
| 12 | 39170287549040392369 |
| 13 | 5123157953193993402171 |
| 14 | 725662909285939100555101 |
| 15 | 110662236267661479984580351 |
| 16 | 18077209893508013563092846849 |