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 | 2 |
| 1 | 10 |
| 2 | 100 |
| 3 | 1264 |
| 4 | 15116 |
| 5 | 171148 |
| 6 | 1864190 |
| 7 | 19697700 |
| 8 | 203534530 |
| 9 | 2067129306 |
| 10 | 20706364528 |
| 11 | 205144046742 |
| 12 | 2014349179358 |
| 13 | 19632546354498 |
| 14 | 190150622868298 |
| 15 | 1831906588192414 |
| 16 | 17567504017456404 |
| 17 | 167794196312059488 |
| 18 | 1597037992049539274 |