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 | 1 |
| 2 | 10 |
| 3 | 255 |
| 4 | 11935 |
| 5 | 879571 |
| 6 | 93365328 |
| 7 | 13464554610 |
| 8 | 2531141851260 |
| 9 | 601339958510170 |
| 10 | 176255315943299736 |
| 11 | 62514948119465302825 |
| 12 | 26407795709641456484010 |
| 13 | 13109371824722841349352160 |