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 | 1 |
| 3 | 30 |
| 4 | 2385 |
| 5 | 273560 |
| 6 | 39078970 |
| 7 | 6512700536 |
| 8 | 1222156339336 |
| 9 | 252751878117712 |
| 10 | 56798072762849412 |
| 11 | 13733835430565197700 |
| 12 | 3548014267149570778764 |
| 13 | 974073193845291808779496 |
| 14 | 283008950620416071533339000 |