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 | 3 |
| 2 | 641 |
| 3 | 643 |
| 4 | 4369 |
| 5 | 25759 |
| 6 | 33149 |
| 7 | 87249 |
| 8 | 129917 |
| 9 | 157637 |
| 10 | 212419 |
| 11 | 332947 |
| 12 | 451901 |
| 13 | 656597 |
| 14 | 656599 |
| 15 | 831405 |
| 16 | 1489665 |
| 17 | 1608461 |
| 18 | 2113665 |
| 19 | 3020357 |
| 20 | 3370637 |
| 21 | 6212357 |
| 22 | 6212359 |
| 23 | 19092917 |
| 24 | 31880577 |
| 25 | 34487597 |
| 26 | 38790749 |
| 27 | 63560683 |
| 28 | 81612105 |
| 29 | 84028407 |
| 30 | 86559045 |
| 31 | 274014885 |