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 | 24 |
| 3 | 531 |
| 4 | 11686 |
| 5 | 257097 |
| 6 | 5656140 |
| 7 | 124435087 |
| 8 | 2737571922 |
| 9 | 60226582293 |
| 10 | 1324984810456 |
| 11 | 29149665830043 |
| 12 | 641292648260958 |
| 13 | 14108438261741089 |
| 14 | 310385641758303972 |
| 15 | 6828484118682687399 |
| 16 | 150226650611019122794 |
| 17 | 3304986313442420701485 |
| 18 | 72709698895733255432688 |
| 19 | 1599613375706131619519155 |