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 | 23 |
| 3 | 255 |
| 4 | 3679 |
| 5 | 65247 |
| 6 | 1371887 |
| 7 | 33347535 |
| 8 | 919848991 |
| 9 | 28382683263 |
| 10 | 968565339983 |
| 11 | 36217270235055 |
| 12 | 1472548026160639 |
| 13 | 64679673007670367 |
| 14 | 3052084360057720367 |
| 15 | 153980839859926277775 |
| 16 | 8270901171633696369631 |