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) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | -1358 |
| 3 | -42740 |
| 4 | 5512492 |
| 5 | 304384600 |
| 6 | -37142220680 |
| 7 | -3034178687600 |
| 8 | 348731717384080 |
| 9 | 38877977386007200 |
| 10 | -4187277821653825760 |
| 11 | -608713688504523233600 |
| 12 | 61068424818638825202880 |
| 13 | 11260738942261526747094400 |
| 14 | -1044883534589865025424443520 |