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 | 5 |
| 3 | 28 |
| 4 | 235 |
| 5 | 1970 |
| 6 | 17201 |
| 7 | 149420 |
| 8 | 1295637 |
| 9 | 11178026 |
| 10 | 96047288 |
| 11 | 822418731 |
| 12 | 7020762655 |