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) |
|---|---|
| 2 | 1010100 |
| 3 | 2200100 |
| 4 | 20130000 |
| 5 | 3243003420 |
| 6 | 55111253530 |
| 7 | 5411665056000 |
| 8 | 33254100107730 |
| 9 | 210324811482600 |
| 10 | 977731833235239280 |