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) |
|---|---|
| 0 | 2 |
| 1 | 5 |
| 2 | 16 |
| 3 | 52 |
| 4 | 174 |
| 5 | 618 |
| 6 | 2300 |
| 7 | 8764 |
| 8 | 34038 |
| 9 | 133858 |
| 10 | 530876 |
| 11 | 2112904 |
| 12 | 8417830 |
| 13 | 33592910 |
| 14 | 134211556 |
| 15 | 536403988 |
| 16 | 2144322638 |