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 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 17 |
| 6 | 25 |
| 7 | 40 |
| 8 | 45 |
| 9 | 143 |
| 10 | 289 |
| 11 | 510 |
| 12 | 524 |
| 13 | 526 |
| 14 | 716 |
| 15 | 756 |
| 16 | 1008 |
| 17 | 1271 |
| 18 | 1370 |
| 19 | 3677 |
| 20 | 7963 |
| 21 | 9053 |