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) |
|---|---|
| 0 | 0 |
| 1 | 3 |
| 2 | 6 |
| 3 | 7 |
| 4 | 13 |
| 5 | 14 |
| 6 | 15 |
| 7 | 27 |
| 8 | 29 |
| 9 | 30 |
| 10 | 31 |
| 11 | 55 |
| 12 | 59 |
| 13 | 61 |
| 14 | 62 |
| 15 | 63 |
| 16 | 111 |
| 17 | 119 |
| 18 | 123 |
| 19 | 125 |
| 20 | 126 |