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 | 6 |
| 3 | 4 |
| 4 | 50 |
| 5 | 397 |
| 6 | 496 |
| 7 | 4167 |
| 8 | 15052 |
| 9 | 30627 |
| 10 | 182105 |
| 11 | 550497 |
| 12 | 447673 |
| 13 | 3143598 |
| 14 | 4821309 |
| 15 | 19552188 |
| 16 | 67889102 |
| 17 | 109303021 |
| 18 | 378355224 |