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 | 7 |
| 2 | 19 |
| 3 | 199 |
| 4 | 223 |
| 5 | 283 |
| 6 | 307 |
| 7 | 367 |
| 8 | 439 |
| 9 | 607 |
| 10 | 643 |
| 11 | 859 |
| 12 | 1039 |
| 13 | 1231 |
| 14 | 1279 |
| 15 | 1291 |
| 16 | 1459 |
| 17 | 1483 |
| 18 | 1543 |
| 19 | 1627 |
| 20 | 1951 |
| 21 | 2131 |
| 22 | 2203 |
| 23 | 2371 |
| 24 | 2383 |
| 25 | 2539 |
| 26 | 2707 |
| 27 | 2719 |
| 28 | 2791 |
| 29 | 3079 |
| 30 | 3499 |
| 31 | 3547 |
| 32 | 3643 |
| 33 | 3727 |
| 34 | 3919 |
| 35 | 4003 |
| 36 | 4051 |
| 37 | 4231 |
| 38 | 4339 |
| 39 | 4423 |
| 40 | 4483 |
| 41 | 4507 |
| 42 | 4567 |