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 | 28 |
| 2 | 784 |
| 3 | 21952 |
| 4 | 377517 |
| 5 | 6442436 |
| 6 | 109264923 |
| 7 | 1841998924 |
| 8 | 30880712109 |
| 9 | 513953862828 |
| 10 | 8524935994485 |
| 11 | 141100741163866 |
| 12 | 2331559436006836 |
| 13 | 38495167111404534 |
| 14 | 635205147205219239 |
| 15 | 10477659617370128080 |