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) |
|---|---|
| 59 | 1 |
| 60 | 60 |
| 61 | 1830 |
| 62 | 37820 |
| 63 | 595665 |
| 64 | 7624512 |
| 65 | 82598880 |
| 66 | 778789440 |
| 67 | 6522361560 |
| 68 | 49280065120 |
| 69 | 340032449328 |
| 70 | 2163842859360 |
| 71 | 12802736917880 |
| 72 | 70907466006720 |
| 73 | 369731787035040 |
| 74 | 1824010149372864 |
| 75 | 8550047575185300 |