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) |
|---|---|
| 1 | 220 |
| 2 | 1210 |
| 3 | 6655 |
| 4 | 34243 |
| 5 | 180829 |
| 6 | 963886 |
| 7 | 5093737 |
| 8 | 26932543 |
| 9 | 142701909 |
| 10 | 755538278 |
| 11 | 3999038946 |
| 12 | 21172904049 |
| 13 | 112098384491 |
| 14 | 593455432350 |
| 15 | 3141868198978 |
| 16 | 16633824615067 |
| 17 | 88062718713584 |
| 18 | 466221475528171 |
| 19 | 2468274573927916 |