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 | 41 |
| 4 | 296 |
| 5 | 2829 |
| 6 | 34637 |
| 7 | 519049 |
| 8 | 9197344 |
| 9 | 188039787 |
| 10 | 4356087231 |
| 11 | 112754069273 |
| 12 | 3224945523736 |
| 13 | 100999970565337 |
| 14 | 3437517630509497 |
| 15 | 126332966608699441 |
| 16 | 4986057436997869696 |
| 17 | 210331809309776028055 |
| 18 | 9443995455881145458715 |