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 | 2 |
| 2 | 7 |
| 3 | 32 |
| 4 | 192 |
| 5 | 1490 |
| 6 | 15067 |
| 7 | 198296 |
| 8 | 3398105 |
| 9 | 75734592 |
| 10 | 2191591226 |
| 11 | 82178300654 |
| 12 | 3984499220967 |
| 13 | 249298391641352 |
| 14 | 20089200308020179 |
| 15 | 2081351202770089728 |