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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 7 |
| 4 | 90 |
| 5 | 97 |
| 6 | 575 |
| 7 | 672 |
| 8 | 8639 |
| 9 | 9311 |
| 10 | 55194 |
| 11 | 64505 |
| 12 | 829254 |
| 13 | 893759 |
| 14 | 5298049 |
| 15 | 6191808 |
| 16 | 79599745 |
| 17 | 85791553 |
| 18 | 508557510 |
| 19 | 594349063 |
| 20 | 7640746266 |
| 21 | 8235095329 |
| 22 | 48816222911 |
| 23 | 57051318240 |
| 24 | 733432041791 |
| 25 | 790483360031 |
| 26 | 4685848841946 |
| 27 | 5476332201977 |
| 28 | 70401835265670 |