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) |
|---|---|
| 10 | 11 |
| 11 | 14 |
| 12 | 21 |
| 13 | 39 |
| 14 | 78 |
| 15 | 211 |
| 16 | 1954 |
| 17 | 63163 |
| 18 | 17163259 |
| 19 | 316235916142 |
| 20 | 7475840758734855197 |
| 21 | 77068358083998565749275388634420 |
| 22 | 56080446471298599543571746837309517827424625680076701163 |