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 | 7 |
| 2 | 19 |
| 3 | 73 |
| 4 | 163 |
| 5 | 487 |
| 6 | 1459 |
| 7 | 2593 |
| 8 | 17497 |
| 9 | 39367 |
| 10 | 52489 |
| 11 | 71119 |
| 12 | 80191 |
| 13 | 87211 |
| 14 | 97687 |
| 15 | 135433 |
| 16 | 139483 |
| 17 | 209953 |
| 18 | 262657 |
| 19 | 379081 |