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 | 292319 |
| 2 | 127113109 |
| 3 | 193191181 |
| 4 | 283281277 |
| 5 | 331317313 |
| 6 | 359353349 |
| 7 | 373367359 |
| 8 | 397389383 |
| 9 | 409401397 |
| 10 | 439433431 |
| 11 | 461457449 |
| 12 | 463461457 |
| 13 | 479467463 |
| 14 | 509503499 |
| 15 | 641631619 |
| 16 | 691683677 |
| 17 | 751743739 |
| 18 | 787773769 |
| 19 | 809797787 |
| 20 | 839829827 |
| 21 | 883881877 |