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 | 147 |
| 2 | 13034 |
| 3 | 907578 |
| 4 | 54807627 |
| 5 | 3016638009 |
| 6 | 155726334148 |
| 7 | 7676501248416 |
| 8 | 365698066506773 |
| 9 | 16976491006185711 |
| 10 | 772549060467762942 |
| 11 | 34614587429584922214 |
| 12 | 1532054031119984651839 |
| 13 | 67151990527665760714053 |