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 | 4 |
| 3 | 5 |
| 4 | 9 |
| 5 | 535 |
| 6 | 979 |
| 7 | 46264 |
| 8 | 59195 |
| 9 | 73637 |
| 10 | 77477 |
| 11 | 99999 |
| 12 | 467764 |
| 13 | 8683868 |
| 14 | 23911932 |
| 15 | 398989893 |
| 16 | 559555955 |
| 17 | 769646967 |
| 18 | 972464279 |
| 19 | 992868299 |
| 20 | 21348884312 |
| 21 | 49612121694 |
| 22 | 450197791054 |
| 23 | 9475082805749 |