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 | 38 |
| 2 | -238 |
| 3 | -136876 |
| 4 | -4000340 |
| 5 | 768888808 |
| 6 | 62860634104 |
| 7 | -5370921754384 |
| 8 | -944216132607088 |
| 9 | 36390910087921760 |
| 10 | 15676398398747125024 |
| 11 | -16391968526453252288 |
| 12 | -290667617977624530780992 |
| 13 | -10714513990411799725496704 |
| 14 | 5948586603063089600488296320 |