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 | 4 |
| 3 | 92 |
| 4 | 4716 |
| 5 | 414716 |
| 6 | 55210372 |
| 7 | 10337500044 |
| 8 | 2587595524492 |
| 9 | 834145695871436 |
| 10 | 336495839997451716 |
| 11 | 166037668496103782012 |