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 | 9 |
| 4 | 10 |
| 5 | 11 |
| 6 | 12 |
| 7 | 15 |
| 8 | 25 |
| 9 | 31 |
| 10 | 46 |
| 11 | 53 |
| 12 | 78 |
| 13 | 318 |
| 14 | 615 |
| 15 | 955 |
| 16 | 1646 |
| 17 | 2669 |
| 18 | 2672 |
| 19 | 3515 |
| 20 | 7689 |