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 | 6 |
| 3 | 12 |
| 4 | 20 |
| 5 | 38 |
| 6 | 53 |
| 7 | 106 |
| 8 | 200 |
| 9 | 369 |
| 10 | 657 |
| 11 | 1227 |
| 12 | 2191 |
| 13 | 4268 |
| 14 | 8076 |
| 15 | 15291 |
| 16 | 28932 |
| 17 | 55125 |
| 18 | 105983 |
| 19 | 202482 |
| 20 | 391506 |