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 | 5 |
| 2 | 20 |
| 3 | 300 |
| 4 | 7200 |
| 5 | 180000 |
| 6 | 5580000 |
| 7 | 195300000 |
| 8 | 7862400000 |
| 9 | 353808000000 |
| 10 | 17713080000000 |
| 11 | 974219400000000 |
| 12 | 58468132800000000 |
| 13 | 3800428632000000000 |
| 14 | 266043625848000000000 |