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 | 31 |
| 2 | 307 |
| 3 | 3067 |
| 4 | 30661 |
| 5 | 306589 |
| 6 | 3065863 |
| 7 | 30658619 |
| 8 | 306586169 |
| 9 | 3065861681 |
| 10 | 30658616789 |
| 11 | 306586167863 |
| 12 | 3065861678629 |
| 13 | 30658616786249 |
| 14 | 306586167862427 |
| 15 | 3065861678624219 |
| 16 | 30658616786242157 |
| 17 | 306586167862421549 |
| 18 | 3065861678624215469 |
| 19 | 30658616786242154603 |
| 20 | 306586167862421546017 |