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) |
|---|---|
| 2 | 7 |
| 3 | 44 |
| 4 | 273 |
| 5 | 1696 |
| 6 | 10573 |
| 7 | 66151 |
| 8 | 415277 |
| 9 | 2615004 |
| 10 | 16512355 |
| 11 | 104526093 |
| 12 | 663143211 |
| 13 | 4215574482 |
| 14 | 26846320149 |
| 15 | 171243444982 |
| 16 | 1093897673897 |
| 17 | 6997031842554 |
| 18 | 44809862773473 |
| 19 | 287283383574927 |
| 20 | 1843675415666053 |
| 21 | 11842954734864350 |
| 22 | 76138777668602115 |
| 23 | 489884818519692190 |