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 | 5 |
| 2 | 31 |
| 3 | 53 |
| 4 | 163 |
| 5 | 509 |
| 6 | 1061 |
| 7 | 13627 |
| 8 | 20047 |
| 9 | 28411 |
| 10 | 50993 |
| 11 | 71453 |
| 12 | 272141 |
| 13 | 1353449 |