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) |
|---|---|
| 72 | 1 |
| 73 | 73 |
| 74 | 2701 |
| 75 | 67525 |
| 76 | 1282975 |
| 77 | 19757815 |
| 78 | 256851595 |
| 79 | 2898753715 |
| 80 | 28987537150 |
| 81 | 260887834350 |
| 82 | 2139280241670 |
| 83 | 16141841823510 |
| 84 | 112992892764570 |
| 85 | 738799683460650 |
| 86 | 4538340912686850 |
| 87 | 26322377293583730 |