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) |
|---|---|
| 4 | 96 |
| 5 | 2500 |
| 6 | 27000 |
| 7 | 180075 |
| 8 | 878080 |
| 9 | 3429216 |
| 10 | 11340000 |
| 11 | 32942250 |
| 12 | 86248800 |
| 13 | 207352860 |
| 14 | 464199736 |
| 15 | 978193125 |
| 16 | 1956864000 |
| 17 | 3741740800 |
| 18 | 6876627840 |
| 19 | 12202737156 |
| 20 | 20988540000 |
| 21 | 35103820500 |
| 22 | 57249238200 |
| 23 | 91254750895 |
| 24 | 142462526976 |
| 25 | 218212500000 |
| 26 | 328451500000 |
| 27 | 486489948750 |