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 | 2 |
| 2 | 4 |
| 3 | 7 |
| 4 | 26 |
| 5 | 28 |
| 6 | 47 |
| 7 | 49 |
| 8 | 60 |
| 9 | 63 |
| 10 | 174 |
| 11 | 207 |
| 12 | 307 |
| 13 | 7670 |
| 14 | 15336 |
| 15 | 18589 |
| 16 | 22189 |
| 17 | 37071 |
| 18 | 44678 |
| 19 | 63604 |
| 20 | 64432 |