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 | 10 |
| 3 | 39 |
| 4 | 208 |
| 5 | 1576 |
| 6 | 14830 |
| 7 | 168500 |
| 8 | 2247280 |
| 9 | 34423760 |
| 10 | 596248800 |
| 11 | 11529957600 |
| 12 | 246360114000 |