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) |
|---|---|
| 3 | 7 |
| 4 | 64 |
| 5 | 352 |
| 6 | 1485 |
| 7 | 5245 |
| 8 | 16290 |
| 9 | 45830 |
| 10 | 119042 |
| 11 | 289367 |
| 12 | 664878 |
| 13 | 1455136 |
| 14 | 3051762 |
| 15 | 6163153 |
| 16 | 12033700 |
| 17 | 22792660 |
| 18 | 41997387 |
| 19 | 75463460 |
| 20 | 132510654 |
| 21 | 227803866 |
| 22 | 384031745 |
| 23 | 635752338 |
| 24 | 1034842530 |
| 25 | 1658130458 |
| 26 | 2617965384 |
| 27 | 4076707044 |