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) |
|---|---|
| 0 | 1 |
| 1 | 35 |
| 2 | 770 |
| 3 | 14260 |
| 4 | 244776 |
| 5 | 4053840 |
| 6 | 65979040 |
| 7 | 1064678720 |
| 8 | 17107266176 |
| 9 | 274296689920 |
| 10 | 4393395202560 |
| 11 | 70331527418880 |
| 12 | 1125602147608576 |
| 13 | 18012016334950400 |
| 14 | 288211318352814080 |
| 15 | 4611533554425610240 |
| 16 | 73785756576381566976 |
| 17 | 1180581862943988449280 |