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 | 4 |
| 2 | 56 |
| 3 | 180 |
| 4 | 400 |
| 5 | 740 |
| 6 | 1224 |
| 7 | 1876 |
| 8 | 2720 |
| 9 | 3780 |
| 10 | 5080 |
| 11 | 6644 |
| 12 | 8496 |
| 13 | 10660 |
| 14 | 13160 |
| 15 | 16020 |
| 16 | 19264 |
| 17 | 22916 |
| 18 | 27000 |
| 19 | 31540 |
| 20 | 36560 |
| 21 | 42084 |
| 22 | 48136 |
| 23 | 54740 |
| 24 | 61920 |
| 25 | 69700 |
| 26 | 78104 |
| 27 | 87156 |
| 28 | 96880 |
| 29 | 107300 |
| 30 | 118440 |