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 | 9 |
| 3 | 181 |
| 4 | 2878 |
| 5 | 38298 |
| 6 | 442776 |
| 7 | 4937680 |
| 8 | 54997237 |
| 9 | 604120810 |
| 10 | 6420599395 |
| 11 | 67512632285 |