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 | 979 |
| 4 | 54801 |
| 5 | 4932051 |
| 6 | 651030673 |
| 7 | 118487582403 |
| 8 | 28437019776609 |
| 9 | 8701728051642211 |
| 10 | 3306656659624040001 |
| 11 | 1527675376746306480243 |
| 12 | 843276807963961177093873 |
| 13 | 548129925176574765111017139 |
| 14 | 414386223433490522423928956721 |
| 15 | 360516014387136754508818192346851 |