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) |
|---|---|
| 1 | 1 |
| 2 | 18 |
| 3 | 243 |
| 4 | 2916 |
| 5 | 32805 |
| 6 | 354294 |
| 7 | 3720087 |
| 8 | 38263752 |
| 9 | 387420489 |
| 10 | 3874204890 |
| 11 | 38354628411 |
| 12 | 376572715308 |
| 13 | 3671583974253 |
| 14 | 35586121596606 |
| 15 | 343151886824415 |
| 16 | 3294258113514384 |
| 17 | 31501343210481297 |
| 18 | 300189270593998242 |
| 19 | 2851798070642983299 |
| 20 | 27017034353459841780 |