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 | 2 |
| 2 | 5 |
| 3 | 11 |
| 4 | 13 |
| 5 | 23 |
| 6 | 61 |
| 7 | 83 |
| 8 | 421 |
| 9 | 1039 |
| 10 | 1511 |
| 11 | 31237 |
| 12 | 60413 |
| 13 | 113177 |
| 14 | 135647 |
| 15 | 258413 |