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 | 13 |
| 2 | 204 |
| 3 | 3120 |
| 4 | 6552 |
| 5 | 7804 |
| 6 | 20532 |
| 7 | 137280 |
| 8 | 123552 |
| 9 | 1268088 |
| 10 | 1302540 |