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 | 3 |
| 2 | 71 |
| 3 | 3447 |
| 4 | 273343 |
| 5 | 31998903 |
| 6 | 5201061455 |
| 7 | 1123596277863 |
| 8 | 311951144828863 |
| 9 | 108355864447215063 |
| 10 | 46066653228356851631 |
| 11 | 23539631662517304379719 |
| 12 | 14238556471214701698866335 |
| 13 | 10063612905845566536549621687 |
| 14 | 8219089293266835899526592972943 |
| 15 | 7682002790499533568011331441585447 |