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) |
|---|---|
| 4 | 14 |
| 5 | 378 |
| 6 | 4804 |
| 7 | 43573 |
| 8 | 325590 |
| 9 | 2149454 |
| 10 | 13054108 |
| 11 | 74688594 |
| 12 | 408634828 |
| 13 | 2159302420 |
| 14 | 11097147528 |
| 15 | 55747502501 |
| 16 | 274790652518 |
| 17 | 1332928973766 |
| 18 | 6377276361900 |
| 19 | 30149660760870 |
| 20 | 141057202034340 |
| 21 | 653892592144620 |
| 22 | 3006490865152440 |
| 23 | 13722387184879650 |
| 24 | 62220533305358076 |