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) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 4 |
| 3 | 207 |
| 4 | 206 |
| 5 | 2475 |
| 6 | 984 |
| 7 | 8171 |
| 8 | 8170 |
| 9 | 45144 |
| 10 | 45143 |
| 11 | 3648830 |
| 12 | 3648829 |
| 13 | 7979077 |
| 14 | 7979076 |
| 15 | 58068862 |
| 16 | 58068861 |
| 17 | 255278295 |
| 18 | 255278294 |