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 | 1095 |
| 2 | 2755 |
| 3 | 7085 |
| 4 | 19119 |
| 5 | 62213 |
| 6 | 200215 |
| 7 | 645837 |
| 8 | 2386807 |
| 9 | 8440325 |
| 10 | 29121087 |
| 11 | 112850957 |
| 12 | 413112487 |
| 13 | 1461095205 |
| 14 | 5765335615 |
| 15 | 21394180445 |
| 16 | 76423033479 |
| 17 | 303819408773 |
| 18 | 1133934761455 |
| 19 | 4067862256797 |
| 20 | 16225029630247 |
| 21 | 60710982378005 |