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) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 354 |
| 3 | 88153 |
| 4 | 48340622 |
| 5 | 46980371858 |
| 6 | 71465177189700 |
| 7 | 157019003242118337 |
| 8 | 471091863366049740694 |
| 9 | 1851713757075363098855542 |