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) |
|---|---|
| 71 | 1 |
| 72 | 72 |
| 73 | 2628 |
| 74 | 64824 |
| 75 | 1215450 |
| 76 | 18474840 |
| 77 | 237093780 |
| 78 | 2641902120 |
| 79 | 26088783435 |
| 80 | 231900297200 |
| 81 | 1878392407320 |
| 82 | 14002561581840 |
| 83 | 96851050941060 |
| 84 | 625806790696080 |
| 85 | 3799541229226200 |
| 86 | 21784036380896880 |