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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 5 |
| 7 | 6 |
| 8 | 7 |
| 9 | 8 |
| 10 | 9 |
| 11 | 10 |
| 12 | 32 |
| 13 | 50 |
| 14 | 64 |
| 15 | 65 |
| 16 | 80 |
| 17 | 81 |
| 18 | 82 |
| 19 | 83 |
| 20 | 84 |
| 21 | 96 |
| 22 | 97 |
| 23 | 98 |
| 24 | 210 |
| 25 | 54320 |
| 26 | 54321 |
| 27 | 64320 |
| 28 | 64321 |
| 29 | 65210 |
| 30 | 764210 |