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) |
|---|---|
| 0 | 1 |
| 1 | 16 |
| 2 | 96 |
| 3 | 400 |
| 4 | 1408 |
| 5 | 4480 |
| 6 | 13312 |
| 7 | 37632 |
| 8 | 102400 |
| 9 | 270336 |
| 10 | 696320 |
| 11 | 1757184 |
| 12 | 4358144 |
| 13 | 10649600 |
| 14 | 25690112 |
| 15 | 61276160 |
| 16 | 144703488 |
| 17 | 338690048 |
| 18 | 786432000 |
| 19 | 1812987904 |
| 20 | 4152360960 |
| 21 | 9453961216 |
| 22 | 21407727616 |
| 23 | 48234496000 |
| 24 | 108179488768 |
| 25 | 241591910400 |
| 26 | 537407782912 |