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 | 537 |
| 3 | 639 |
| 4 | 647 |
| 5 | 653 |
| 6 | 655 |
| 7 | 657 |
| 8 | 661 |
| 9 | 663 |
| 10 | 672 |
| 11 | 674 |
| 12 | 684 |
| 13 | 686 |