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 | 2 |
| 3 | 8 |
| 4 | 73 |
| 5 | 5345 |
| 6 | 28569050 |
| 7 | 816190617902536 |
| 8 | 666167124752123519223995231345 |
| 9 | 443778638100511299954105018279514127887014869775300070509089 |