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 | 12 |
| 3 | 36 |
| 4 | 540 |
| 5 | 844 |
| 6 | 1192 |
| 7 | 12136 |
| 8 | 84280 |
| 9 | 128356 |
| 10 | 317464 |
| 11 | 3018556 |