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 | 15 |
| 3 | 583 |
| 4 | 95101 |
| 5 | 63868351 |
| 6 | 177385265619 |
| 7 | 2043774880960645 |
| 8 | 97587614786720584857 |