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 | 0 |
| 1 | 1 |
| 2 | 3 |
| 3 | 13 |
| 4 | 183 |
| 5 | 33673 |
| 6 | 1133904603 |
| 7 | 1285739649838492213 |
| 8 | 1653126447166808570252515315100129583 |
| 9 | 2732827050322355127169206170438813672515557678636778921646668538491883473 |