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 | 69 |
| 3 | 180 |
| 4 | 783 |
| 5 | 859 |
| 6 | 1803 |
| 7 | 10763 |
| 8 | 19105 |
| 9 | 39568 |
| 10 | 50172 |
| 11 | 132572 |
| 12 | 355146 |
| 13 | 1452050 |
| 14 | 2245950 |
| 15 | 3047334 |
| 16 | 3933030 |
| 17 | 4165171 |
| 18 | 98544173 |