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) |
|---|---|
| 63 | 1 |
| 64 | 64 |
| 65 | 2080 |
| 66 | 45760 |
| 67 | 766480 |
| 68 | 10424128 |
| 69 | 119877472 |
| 70 | 1198774720 |
| 71 | 10639125640 |
| 72 | 85113005120 |
| 73 | 621324937376 |
| 74 | 4179822305984 |
| 75 | 26123889412400 |
| 76 | 152724276564800 |
| 77 | 839983521106400 |
| 78 | 4367914309753280 |
| 79 | 21566576904406820 |