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 | 2 |
| 3 | 97 |
| 4 | 6460 |
| 5 | 3708321 |
| 6 | 5075612300 |
| 7 | 40651048407879 |
| 8 | 1063834786036208904 |
| 9 | 129443742138071637706453 |