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 | 1 |
| 2 | 13 |
| 3 | 481 |
| 4 | 44669 |
| 5 | 1237231339 |
| 6 | 1546675117 |
| 7 | 62823773963 |
| 8 | 284876771881 |
| 9 | 1119485807557 |
| 10 | 26598440989093 |