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 | 10 |
| 2 | 45 |
| 3 | 150 |
| 4 | 756 |
| 5 | 1530 |
| 6 | 5100 |
| 7 | 7301 |
| 8 | 38646 |
| 9 | 42940 |
| 10 | 430263 |
| 11 | 391149 |