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 | 33 |
| 2 | 594 |
| 3 | 7722 |
| 4 | 81081 |
| 5 | 729729 |
| 6 | 5837832 |
| 7 | 42532776 |
| 8 | 287096238 |
| 9 | 1818276174 |
| 10 | 10909657044 |
| 11 | 62482581252 |
| 12 | 343654196886 |
| 13 | 1824010737318 |
| 14 | 9380626649064 |
| 15 | 46903133245320 |
| 16 | 228652774570935 |
| 17 | 1089463220014455 |
| 18 | 5084161693400790 |