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 | 11 |
| 3 | 112 |
| 4 | 184 |
| 5 | 721 |
| 6 | 3520 |
| 7 | 6643 |
| 8 | 12793 |
| 9 | 67448 |
| 10 | 208380 |
| 11 | 364578 |
| 12 | 1123485 |
| 13 | 9549790 |
| 14 | 23340555 |
| 15 | 88637856 |