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 | 2 |
| 2 | 6 |
| 3 | 272 |
| 4 | 6006 |
| 5 | 289982 |
| 6 | 2629262 |
| 7 | 6039306 |
| 8 | 27999972 |
| 9 | 28233282 |
| 10 | 2704884072 |
| 11 | 20278187202 |
| 12 | 20591819502 |
| 13 | 2592587852952 |
| 14 | 2936231326392 |
| 15 | 21809166190812 |
| 16 | 27237788773272 |
| 17 | 229145919541922 |
| 18 | 233552101255332 |
| 19 | 250087292780052 |
| 20 | 2243922442293422 |
| 21 | 2570769009670752 |
| 22 | 20333113431133302 |
| 23 | 27785925652958772 |