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 | 1 |
| 2 | 7 |
| 3 | 889 |
| 4 | 2359 |
| 5 | 299593 |
| 6 | 2033143 |
| 7 | 13549249 |
| 8 | 42931441 |
| 9 | 100170217 |
| 10 | 310935751 |
| 11 | 685169191 |
| 12 | 3606045247 |
| 13 | 4566096913 |
| 14 | 5452293007 |
| 15 | 6620620783 |
| 16 | 12721617559 |
| 17 | 30987132463 |
| 18 | 65576560063 |
| 19 | 92349997537 |
| 20 | 104785348087 |
| 21 | 457967746369 |