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) |
|---|---|
| 68 | 1 |
| 69 | 69 |
| 70 | 2415 |
| 71 | 57155 |
| 72 | 1028790 |
| 73 | 15020334 |
| 74 | 185250786 |
| 75 | 1984829850 |
| 76 | 18855883575 |
| 77 | 161322559475 |
| 78 | 1258315963905 |
| 79 | 9036996468045 |
| 80 | 60246643120300 |
| 81 | 375382930211100 |
| 82 | 2198671448379300 |
| 83 | 12165982014365460 |
| 84 | 63871405575418665 |