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 | 12 |
| 2 | 18 |
| 3 | 36 |
| 4 | 75 |
| 5 | 168 |
| 6 | 386 |
| 7 | 888 |
| 8 | 2079 |
| 9 | 4960 |
| 10 | 11988 |
| 11 | 29280 |
| 12 | 72145 |
| 13 | 179112 |
| 14 | 447636 |
| 15 | 1124956 |
| 16 | 2840097 |
| 17 | 7197780 |
| 18 | 18301738 |
| 19 | 46669404 |
| 20 | 119308938 |
| 21 | 305704584 |
| 22 | 784938678 |
| 23 | 2019335340 |
| 24 | 5204309886 |
| 25 | 13435321764 |
| 26 | 34738762062 |
| 27 | 89952855848 |