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 | 269005729 |
| 2 | 290863679 |
| 3 | 473802661 |
| 4 | 527835169 |
| 5 | 706754921 |
| 6 | 754921967 |
| 7 | 801087773 |
| 8 | 835844717 |
| 9 | 717445879 |
| 10 | 796098493 |
| 11 | 849365327 |
| 12 | 327965863 |
| 13 | 991013741 |
| 14 | 984449143 |
| 15 | 143096677 |
| 16 | 136716319 |
| 17 | 128763773 |
| 18 | 377314703 |
| 19 | 833162821 |
| 20 | 294047891 |
| 21 | 654433627 |