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 | 4 |
| 2 | 16 |
| 3 | 64 |
| 4 | 244 |
| 5 | 856 |
| 6 | 2776 |
| 7 | 8356 |
| 8 | 23032 |
| 9 | 59200 |
| 10 | 142624 |
| 11 | 324484 |
| 12 | 696256 |
| 13 | 1422436 |
| 14 | 2779900 |
| 15 | 5219452 |
| 16 | 9455596 |