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) |
|---|---|
| 7 | 719 |
| 8 | 5759 |
| 9 | 51839 |
| 10 | 518399 |
| 11 | 5702399 |
| 12 | 68428799 |
| 13 | 889574399 |
| 14 | 12454041599 |
| 15 | 186810623999 |
| 16 | 2988969983999 |
| 17 | 50812489727999 |
| 18 | 914624815103999 |
| 19 | 17377871486975999 |
| 20 | 347557429739519999 |