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 | 1 |
| 2 | 1 |
| 3 | 29 |
| 4 | 11 |
| 5 | 13 |
| 6 | 17 |
| 7 | 523 |
| 8 | 31 |
| 9 | 66197 |
| 10 | 83651 |
| 11 | 21253 |
| 12 | 3660541 |
| 13 | 520783 |
| 14 | 668861 |
| 15 | 3322147 |
| 16 | 30013913 |
| 17 | 12938197 |
| 18 | 4073039057 |
| 19 | 310878307 |
| 20 | 6867070733 |
| 21 | 668207557 |
| 22 | 104732138813 |
| 23 | 56875471 |
| 24 | 253267848881 |
| 25 | 6285904022089 |
| 26 | 913083596083 |
| 27 | 2612577367192619 |
| 28 | 3420422655984353 |