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 | 32 |
| 4 | 90 |
| 5 | 11767 |
| 6 | 409478 |
| 7 | 266882021 |
| 8 | 218955384065 |
| 9 | 942790501392266 |