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 | 4 |
| 3 | 17 |
| 4 | 19 |
| 5 | 148 |
| 6 | 1577 |
| 7 | 3564 |
| 8 | 4388 |
| 9 | 5873 |
| 10 | 6639 |
| 11 | 8579 |
| 12 | 62500 |
| 13 | 376636 |
| 14 | 792949 |
| 15 | 996044 |
| 16 | 1174065 |
| 17 | 3333551 |
| 18 | 5179004 |
| 19 | 7516003 |