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 | 4 |
| 2 | 5 |
| 3 | 7 |
| 4 | 11 |
| 5 | 12 |
| 6 | 14 |
| 7 | 18 |
| 8 | 28 |
| 9 | 30 |
| 10 | 62 |
| 11 | 135 |
| 12 | 153 |
| 13 | 275 |
| 14 | 584 |
| 15 | 630 |
| 16 | 1424 |
| 17 | 1493 |
| 18 | 4419 |
| 19 | 8492 |
| 20 | 10950 |