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 | 5 |
| 3 | 9 |
| 4 | 17 |
| 5 | 27 |
| 6 | 37 |
| 7 | 85 |
| 8 | 169 |
| 9 | 151 |
| 10 | 219 |
| 11 | 533 |
| 12 | 1553 |
| 13 | 2333 |
| 14 | 4197 |
| 15 | 2607 |
| 16 | 2419 |
| 17 | 6343 |
| 18 | 25235 |
| 19 | 55337 |
| 20 | 113875 |
| 21 | 35671 |