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 | 1 |
| 2 | 7 |
| 3 | 107 |
| 4 | 149 |
| 5 | 953 |
| 6 | 218107 |
| 7 | 402859 |
| 8 | 4877 |
| 9 | 379721 |
| 10 | 4349353 |
| 11 | 169373 |
| 12 | 182473 |
| 13 | 1940144339383 |
| 14 | 2184641 |
| 15 | 437064932281 |
| 16 | 5136696159619 |
| 17 | 67580875919190833 |
| 18 | 1156764458711 |
| 19 | 464994193118899 |
| 20 | 4617931439293 |
| 21 | 1277512103328491957510030561 |
| 22 | 8177269604099 |