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) |
|---|---|
| 55 | 1 |
| 56 | 56 |
| 57 | 1596 |
| 58 | 30856 |
| 59 | 455126 |
| 60 | 5461512 |
| 61 | 55525372 |
| 62 | 491796152 |
| 63 | 3872894697 |
| 64 | 27540584512 |
| 65 | 179013799328 |
| 66 | 1074082795968 |
| 67 | 5996962277488 |
| 68 | 31368725759168 |
| 69 | 154603005527328 |
| 70 | 721480692460864 |
| 71 | 3201570572795084 |
| 72 | 13559593014190944 |