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 | 19 |
| 2 | 31 |
| 3 | 43 |
| 4 | 67 |
| 5 | 89 |
| 6 | 101 |
| 7 | 113 |
| 8 | 131 |
| 9 | 229 |
| 10 | 241 |
| 11 | 277 |
| 12 | 359 |
| 13 | 383 |
| 14 | 491 |
| 15 | 523 |
| 16 | 619 |
| 17 | 631 |
| 18 | 643 |
| 19 | 701 |
| 20 | 761 |
| 21 | 1321 |
| 22 | 1381 |
| 23 | 1621 |
| 24 | 2221 |
| 25 | 2861 |