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 | 11 |
| 2 | -112 |
| 3 | -4833 |
| 4 | -44800 |
| 5 | -141793 |
| 6 | 1306368 |
| 7 | 30067007 |
| 8 | 413204480 |
| 9 | 5116733631 |
| 10 | 61817364224 |
| 11 | 742794011807 |
| 12 | 8915670466560 |
| 13 | 106992389648351 |
| 14 | 1283916988759808 |
| 15 | 15407019011695743 |
| 16 | 184884254600069120 |