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 | 9 |
| 2 | 89 |
| 3 | 961 |
| 4 | 11265 |
| 5 | 142601 |
| 6 | 1940089 |
| 7 | 28245729 |
| 8 | 438351041 |
| 9 | 7226001865 |
| 10 | 126122874201 |
| 11 | 2324074591169 |
| 12 | 45094140207169 |
| 13 | 919088049256521 |
| 14 | 19633713260950265 |
| 15 | 438708172312264801 |
| 16 | 10234490436580101249 |