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 | 1 |
| 2 | 8 |
| 3 | 75 |
| 4 | 840 |
| 5 | 11025 |
| 6 | 166320 |
| 7 | 2837835 |
| 8 | 54054000 |
| 9 | 1137161025 |
| 10 | 26189163000 |
| 11 | 655383804075 |
| 12 | 17709112020600 |
| 13 | 513880482740625 |
| 14 | 15938200818540000 |
| 15 | 526174085058496875 |
| 16 | 18422283260401020000 |
| 17 | 681816379418800250625 |
| 18 | 26597171457203972625000 |
| 19 | 1090705672840839577396875 |