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 | 81 |
| 3 | 289 |
| 4 | 1089 |
| 5 | 8836 |
| 6 | 6889 |
| 7 | 80089 |
| 8 | 688900 |
| 9 | 1868689 |
| 10 | 8508889 |
| 11 | 29888089 |
| 12 | 288898009 |
| 13 | 983888689 |
| 14 | 3808988089 |
| 15 | 8680089889 |
| 16 | 86908808809 |
| 17 | 488088068689 |
| 18 | 878686888689 |
| 19 | 2888986888804 |
| 20 | 48890888808804 |
| 21 | 108506888888896 |
| 22 | 88869893888889 |
| 23 | 880881089888881 |
| 24 | 788088668888889 |