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 | 0 |
| 2 | 11 |
| 3 | 214 |
| 4 | 6555 |
| 5 | 262770 |
| 6 | 13076765 |
| 7 | 777866388 |
| 8 | 53853263165 |
| 9 | 4254252038764 |
| 10 | 377667803463431 |
| 11 | 37222867283396314 |
| 12 | 4033161189724173207 |
| 13 | 476511397553009371918 |
| 14 | 60969023704806106263737 |
| 15 | 8398605422371512041566888 |