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 | 18 |
| 1 | 198 |
| 2 | 1298 |
| 3 | 5778 |
| 4 | 19602 |
| 5 | 54758 |
| 6 | 132498 |
| 7 | 287298 |
| 8 | 571538 |
| 9 | 1060902 |