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 | 0 |
| 2 | 0 |
| 3 | 648 |
| 4 | 7128 |
| 5 | 85536 |
| 6 | 870750 |
| 7 | 8937054 |
| 8 | 89606088 |
| 9 | 899190558 |
| 10 | 8995054860 |
| 11 | 89990100090 |
| 12 | 899940633714 |
| 13 | 8999883000108 |
| 14 | 89999307063540 |
| 15 | 899998650010008 |
| 16 | 8999992080398088 |
| 17 | 89999984700000144 |
| 18 | 899999910900869040 |
| 19 | 8999999829000000162 |
| 20 | 89999999010004961988 |