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) |
|---|---|
| 3 | 18 |
| 4 | 144 |
| 5 | 625 |
| 6 | 1980 |
| 7 | 5145 |
| 8 | 11648 |
| 9 | 23814 |
| 10 | 45000 |
| 11 | 79860 |
| 12 | 134640 |
| 13 | 217503 |
| 14 | 338884 |
| 15 | 511875 |
| 16 | 752640 |
| 17 | 1080860 |
| 18 | 1520208 |
| 19 | 2098854 |
| 20 | 2850000 |
| 21 | 3812445 |
| 22 | 5031180 |
| 23 | 6558013 |
| 24 | 8452224 |
| 25 | 10781250 |
| 26 | 13621400 |
| 27 | 17058600 |
| 28 | 21189168 |
| 29 | 26120619 |
| 30 | 31972500 |
| 31 | 38877255 |