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 | 1 |
| 2 | 3 |
| 3 | 9 |
| 4 | 17 |
| 5 | 55 |
| 6 | 77 |
| 7 | 133 |
| 8 | 195 |
| 9 | 357 |
| 10 | 1537 |
| 11 | 2629 |
| 12 | 3409 |
| 13 | 8007 |
| 14 | 25671 |
| 15 | 48003 |
| 16 | 55811 |
| 17 | 94983 |
| 18 | 109615 |
| 19 | 135669 |