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 | 99 |
| 2 | 9801 |
| 3 | 970299 |
| 4 | 96059601 |
| 5 | 9509900499 |
| 6 | 941480149401 |
| 7 | 93206534790699 |
| 8 | 9227446944279201 |
| 9 | 913517247483640899 |
| 10 | 90438207500880449001 |
| 11 | 8953382542587164451099 |
| 12 | 886384871716129280658801 |
| 13 | 87752102299896798785221299 |
| 14 | 8687458127689783079736908601 |