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 | 15 |
| 3 | 19 |
| 4 | 26 |
| 5 | 31 |
| 6 | 129 |
| 7 | 139 |
| 8 | 211 |
| 9 | 242 |
| 10 | 246 |
| 11 | 251 |
| 12 | 474 |
| 13 | 552 |
| 14 | 558 |
| 15 | 694 |
| 16 | 801 |
| 17 | 1001 |
| 18 | 1123 |
| 19 | 1313 |
| 20 | 1687 |
| 21 | 4168 |
| 22 | 4484 |
| 23 | 5611 |
| 24 | 6869 |
| 25 | 12197 |
| 26 | 13472 |