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 | 4 |
| 2 | 6 |
| 3 | 11 |
| 4 | 13 |
| 5 | 24 |
| 6 | 66 |
| 7 | 68 |
| 8 | 75 |
| 9 | 167 |
| 10 | 171 |
| 11 | 172 |
| 12 | 287 |
| 13 | 310 |
| 14 | 352 |
| 15 | 384 |
| 16 | 457 |
| 17 | 564 |
| 18 | 590 |
| 19 | 616 |
| 20 | 620 |
| 21 | 643 |
| 22 | 849 |
| 23 | 1391 |
| 24 | 1552 |
| 25 | 1613 |
| 26 | 1849 |
| 27 | 2122 |
| 28 | 2647 |
| 29 | 2673 |
| 30 | 4413 |