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 | 1 |
| 2 | 4 |
| 3 | 18 |
| 4 | 58 |
| 5 | 59 |
| 6 | 141 |
| 7 | 471418 |
| 8 | 185310604 |
| 9 | 451023506 |
| 10 | 1184061400 |
| 11 | 1844511706 |
| 12 | 4474395400 |
| 13 | 14266749459 |
| 14 | 18444896915 |
| 15 | 48521543066 |
| 16 | 11838218371106 |
| 17 | 39270880053981 |