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 | 3 |
| 2 | 6 |
| 3 | 22 |
| 4 | 76 |
| 5 | 247 |
| 6 | 848 |
| 7 | 2892 |
| 8 | 9969 |
| 9 | 34455 |
| 10 | 119894 |
| 11 | 420582 |
| 12 | 1482874 |
| 13 | 5254954 |
| 14 | 18714432 |
| 15 | 66969859 |
| 16 | 240739417 |