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) |
|---|---|
| 0 | 1 |
| 1 | 35 |
| 2 | 775 |
| 3 | 13895 |
| 4 | 220591 |
| 5 | 3239495 |
| 6 | 45114175 |
| 7 | 605081015 |
| 8 | 7896440431 |
| 9 | 100983137255 |
| 10 | 1271943884575 |
| 11 | 15837914099735 |
| 12 | 195494604120271 |
| 13 | 2397051804927815 |
| 14 | 29242027752046975 |
| 15 | 355340314794184055 |
| 16 | 4305125050033912111 |
| 17 | 52039828472216683175 |
| 18 | 627954645427055761375 |