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 | 5 |
| 2 | 101 |
| 3 | 4689 |
| 4 | 381769 |
| 5 | 47849053 |
| 6 | 8532452397 |
| 7 | 2051184222377 |
| 8 | 639121206054545 |
| 9 | 250473754883360181 |
| 10 | 120568689462321176053 |
| 11 | 69926680208791530760705 |
| 12 | 48091629862193464534126041 |