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) |
|---|---|
| 1 | 0 |
| 2 | 8 |
| 3 | 288 |
| 4 | 2208 |
| 5 | 9200 |
| 6 | 27720 |
| 7 | 68208 |
| 8 | 146048 |
| 9 | 282528 |
| 10 | 505800 |
| 11 | 851840 |
| 12 | 1365408 |
| 13 | 2101008 |
| 14 | 3123848 |
| 15 | 4510800 |
| 16 | 6351360 |
| 17 | 8748608 |
| 18 | 11820168 |
| 19 | 15699168 |
| 20 | 20535200 |
| 21 | 26495280 |
| 22 | 33764808 |
| 23 | 42548528 |
| 24 | 53071488 |
| 25 | 65580000 |
| 26 | 80342600 |
| 27 | 97651008 |