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 | 7 |
| 2 | 349 |
| 3 | 19207 |
| 4 | 117991 |
| 5 | 120049 |
| 6 | 823591 |
| 7 | 5765143 |
| 8 | 5882449 |
| 9 | 6588343 |
| 10 | 40353949 |
| 11 | 282475591 |
| 12 | 2017680349 |
| 13 | 2259801991 |
| 14 | 13841289601 |
| 15 | 14123762449 |
| 16 | 96894775207 |
| 17 | 96929364013 |
| 18 | 678223072897 |
| 19 | 678223075249 |
| 20 | 4747567274743 |
| 21 | 5425784582791 |