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 | 3 |
| 2 | 5 |
| 3 | 6 |
| 4 | 7 |
| 5 | 11 |
| 6 | 14 |
| 7 | 15 |
| 8 | 58 |
| 9 | 85 |
| 10 | 493 |
| 11 | 638 |
| 12 | 2871 |
| 13 | 16731 |
| 14 | 97513 |
| 15 | 568345 |
| 16 | 3312555 |
| 17 | 19306983 |
| 18 | 112529341 |
| 19 | 655869061 |
| 20 | 3822685023 |
| 21 | 22280241075 |
| 22 | 129858761425 |
| 23 | 756872327473 |
| 24 | 4411375203411 |
| 25 | 25711378892991 |
| 26 | 149856898154533 |
| 27 | 873430010034205 |
| 28 | 5090723162050695 |