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 | 3 |
| 3 | 30 |
| 4 | 514 |
| 5 | 15782 |
| 6 | 923808 |
| 7 | 91052720 |
| 8 | 17200095426 |
| 9 | 5976334149476 |
| 10 | 3829861209246738 |