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 | 3 |
| 3 | 9 |
| 4 | 37 |
| 5 | 173 |
| 6 | 921 |
| 7 | 5185 |
| 8 | 30497 |
| 9 | 184469 |
| 10 | 1140413 |
| 11 | 7170085 |
| 12 | 45704821 |