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 | 20 |
| 3 | 348 |
| 4 | 6093 |
| 5 | 108182 |
| 6 | 1890123 |
| 7 | 31500927 |
| 8 | 490890277 |
| 9 | 7086257602 |
| 10 | 94548676765 |
| 11 | 1167995082810 |
| 12 | 13406707973018 |
| 13 | 143598707530374 |
| 14 | 1441525802509250 |
| 15 | 13619352767824724 |
| 16 | 121574625625030584 |
| 17 | 1029031775725235400 |
| 18 | 8285521569322196569 |
| 19 | 63648858792893665714 |