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 | 3 |
| 2 | 7 |
| 3 | 11 |
| 4 | 20 |
| 5 | 28 |
| 6 | 63 |
| 7 | 72 |
| 8 | 79 |
| 9 | 688 |
| 10 | 795 |
| 11 | 999 |
| 12 | 2716 |
| 13 | 13220 |
| 14 | 15940 |
| 15 | 17903 |
| 16 | 26832 |
| 17 | 28416 |
| 18 | 33448 |
| 19 | 117923 |