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 | 16 |
| 3 | 36 |
| 4 | 100 |
| 5 | 256 |
| 6 | 676 |
| 7 | 1764 |
| 8 | 4624 |
| 9 | 12100 |
| 10 | 31684 |
| 11 | 82944 |
| 12 | 217156 |
| 13 | 568516 |
| 14 | 1488400 |
| 15 | 3896676 |
| 16 | 10201636 |
| 17 | 26708224 |
| 18 | 69923044 |
| 19 | 183060900 |
| 20 | 479259664 |
| 21 | 1254718084 |
| 22 | 3284894596 |
| 23 | 8599965696 |
| 24 | 22515002500 |
| 25 | 58945041796 |
| 26 | 154320122896 |
| 27 | 404015326884 |