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 | 20 |
| 2 | 295 |
| 3 | 3471 |
| 4 | 41006 |
| 5 | 485714 |
| 6 | 5777663 |
| 7 | 68892600 |
| 8 | 822141033 |
| 9 | 9813968785 |
| 10 | 117159879996 |
| 11 | 1398692077165 |
| 12 | 16698106010927 |
| 13 | 199348287106117 |
| 14 | 2379894628461976 |
| 15 | 28412070357384947 |
| 16 | 339193873130519142 |