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 | 44 |
| 2 | 1892 |
| 3 | 81356 |
| 4 | 3498308 |
| 5 | 150427244 |
| 6 | 6468370546 |
| 7 | 278139892800 |
| 8 | 11960013642192 |
| 9 | 514280511441312 |
| 10 | 22114058759539824 |
| 11 | 950904387665438976 |
| 12 | 40888882692839511330 |
| 13 | 1758221698790838894228 |
| 14 | 75603521996953503778764 |