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 | 90 |
| 2 | 8550 |
| 3 | 826500 |
| 4 | 80583750 |
| 5 | 7897207500 |
| 6 | 776558737500 |
| 7 | 76546504125000 |
| 8 | 7558967282343750 |
| 9 | 747497875698437500 |
| 10 | 74002289694145312500 |
| 11 | 7332954160601671875000 |
| 12 | 727184620926332460937500 |
| 13 | 72159089307305298046875000 |
| 14 | 7164366724082454591796875000 |