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 | 33 |
| 3 | 1161 |
| 4 | 140545 |
| 5 | 63148833 |
| 6 | 111254837505 |
| 7 | 793938286762113 |
| 8 | 23282575640347295745 |
| 9 | 2812444483776375381074433 |
| 10 | 1393909730376211388561041231873 |