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 | 9 |
| 4 | 96 |
| 5 | 500 |
| 6 | 1800 |
| 7 | 5145 |
| 8 | 12544 |
| 9 | 27216 |
| 10 | 54000 |
| 11 | 99825 |
| 12 | 174240 |
| 13 | 290004 |
| 14 | 463736 |
| 15 | 716625 |
| 16 | 1075200 |
| 17 | 1572160 |
| 18 | 2247264 |
| 19 | 3148281 |
| 20 | 4332000 |
| 21 | 5865300 |
| 22 | 7826280 |
| 23 | 10305449 |
| 24 | 13406976 |
| 25 | 17250000 |
| 26 | 21970000 |
| 27 | 27720225 |
| 28 | 34673184 |
| 29 | 43022196 |
| 30 | 52983000 |
| 31 | 64795425 |
| 32 | 78725120 |
| 33 | 95065344 |