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) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 28 |
| 3 | 340 |
| 4 | 7108 |
| 5 | 254404 |
| 6 | 15531268 |
| 7 | 1613235460 |
| 8 | 284556079108 |
| 9 | 85107970698244 |
| 10 | 43112647751430148 |
| 11 | 36955277740855136260 |
| 12 | 53562598422461559373828 |
| 13 | 131186989945696839128432644 |
| 14 | 542676256323680030599454982148 |