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 | 4 |
| 2 | 499 |
| 3 | 54940 |
| 4 | 6042955 |
| 5 | 664670164 |
| 6 | 73107675139 |
| 7 | 8041179595180 |
| 8 | 884456647794715 |
| 9 | 97282190077823524 |
| 10 | 10700156451912792979 |
| 11 | 1176919927520329404220 |
| 12 | 129450491870784321671275 |
| 13 | 14238377185858755054436084 |
| 14 | 1566092039952592271666298019 |
| 15 | 172255886017599291128238346060 |