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 | 21431054537 |
| 2 | 21432548723 |
| 3 | 21434790073 |
| 4 | 21458701993 |
| 5 | 21459449359 |
| 6 | 21469165979 |
| 7 | 21469913441 |
| 8 | 21493088707 |
| 9 | 21513279971 |
| 10 | 21519263281 |
| 11 | 21539459009 |
| 12 | 21551428939 |
| 13 | 21561155387 |
| 14 | 21564148241 |
| 15 | 21566392973 |
| 16 | 21573876703 |
| 17 | 21576870299 |
| 18 | 21577618697 |
| 19 | 21583606153 |
| 20 | 21585103073 |