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 | 0 |
| 2 | 0 |
| 3 | 5 |
| 4 | 366 |
| 5 | 129871 |
| 6 | 174041330 |
| 7 | 1343294003351 |
| 8 | 41725919954578785 |
| 9 | 7159149948562719664049 |
| 10 | 5065741493544986113047994120 |