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 | 49 |
| 4 | 337 |
| 5 | 2323 |
| 6 | 15895 |
| 7 | 108907 |
| 8 | 743275 |
| 9 | 5076727 |
| 10 | 34593817 |
| 11 | 235848025 |
| 12 | 1605431161 |
| 13 | 10932074707 |
| 14 | 74359524127 |
| 15 | 505919033077 |
| 16 | 3439312212373 |
| 17 | 23385464090653 |
| 18 | 158908887045391 |
| 19 | 1079980801470055 |
| 20 | 7336154460020575 |
| 21 | 49839495892607983 |
| 22 | 338457699117215161 |
| 23 | 2298679365204410725 |
| 24 | 15606607183401398473 |