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 | 16 |
| 2 | 124 |
| 3 | 796 |
| 4 | 5924 |
| 5 | 44916 |
| 6 | 348652 |
| 7 | 2743036 |
| 8 | 21801764 |
| 9 | 174565444 |
| 10 | 1405459324 |
| 11 | 11362215276 |
| 12 | 92138276228 |
| 13 | 748875775404 |
| 14 | 6097017988948 |
| 15 | 49701864868956 |
| 16 | 405539673414148 |
| 17 | 3311264043438796 |
| 18 | 27050524930821556 |
| 19 | 221065493126829404 |