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) |
|---|---|
| 5 | 1875 |
| 6 | 25920 |
| 7 | 184877 |
| 8 | 917504 |
| 9 | 3582306 |
| 10 | 11760000 |
| 11 | 33820710 |
| 12 | 87588864 |
| 13 | 208295373 |
| 14 | 461452992 |
| 15 | 962836875 |
| 16 | 1908408320 |
| 17 | 3617795636 |
| 18 | 6595852032 |
| 19 | 11617856508 |
| 20 | 19845120000 |
| 21 | 32979115575 |
| 22 | 53463778368 |
| 23 | 84747328281 |
| 24 | 131616866304 |
| 25 | 200621093750 |
| 26 | 300598812800 |
| 27 | 443333396610 |