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 | 18 |
| 2 | 324 |
| 3 | 660 |
| 4 | 2032 |
| 5 | 4728 |
| 6 | 11994 |
| 7 | 29982 |
| 8 | 77141 |
| 9 | 193184 |
| 10 | 485658 |
| 11 | 1213580 |
| 12 | 3090430 |
| 13 | 7754424 |
| 14 | 19478100 |
| 15 | 49010084 |
| 16 | 123869662 |
| 17 | 311515934 |
| 18 | 782045058 |
| 19 | 1972950126 |
| 20 | 4972883946 |
| 21 | 12497401442 |
| 22 | 31449373036 |
| 23 | 79304725202 |
| 24 | 199577343966 |