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 | 20 |
| 1 | 801 |
| 2 | 32060 |
| 3 | 1283201 |
| 4 | 51360100 |
| 5 | 2055687201 |
| 6 | 82278848140 |
| 7 | 3293209612801 |
| 8 | 131810663360180 |
| 9 | 5275719744020001 |
| 10 | 211160600424160220 |
| 11 | 8451699736710428801 |
| 12 | 338279150068841312260 |
| 13 | 13539617702490362919201 |
| 14 | 541922987249683358080300 |