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 | 4 |
| 3 | 5 |
| 4 | 28 |
| 5 | 1783 |
| 6 | 7148 |
| 7 | 273223 |
| 8 | 398314 |
| 9 | 1180939 |
| 10 | 1751431 |
| 11 | 10970993 |
| 12 | 17545207 |
| 13 | 20110862 |
| 14 | 190270082 |
| 15 | 10261454491 |