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 | 9 |
| 2 | 23 |
| 3 | 83 |
| 4 | 431 |
| 5 | 3001 |
| 6 | 27457 |
| 7 | 318211 |
| 8 | 4535189 |
| 9 | 77557187 |
| 10 | 1559861749 |
| 11 | 36294260117 |
| 12 | 963726515729 |
| 13 | 28871271685163 |
| 14 | 966399998477597 |
| 15 | 35843152090509943 |
| 16 | 1462429366668283501 |