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 | 5 |
| 3 | 37 |
| 4 | -887 |
| 5 | -168919 |
| 6 | -21607859 |
| 7 | -2799384755 |
| 8 | -337767590383 |
| 9 | -11912361112367 |
| 10 | 21032925955607701 |
| 11 | 16703816669710968821 |
| 12 | 10654267957172226744985 |
| 13 | 6614425802684094455696377 |
| 14 | 4120103872599589439389105373 |