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 | 72 |
| 2 | 800 |
| 3 | 6272 |
| 4 | 30375 |
| 5 | 247808 |
| 6 | 750141 |
| 7 | 1384448 |
| 8 | 37879808 |
| 9 | 189267968 |
| 10 | 235782657 |
| 11 | 1313046875 |
| 12 | 1749600000 |
| 13 | 3502727631 |
| 14 | 4437573632 |
| 15 | 338751673344 |
| 16 | 451508436992 |
| 17 | 634465620819 |
| 18 | 2063731785728 |
| 19 | 7863818359375 |
| 20 | 7971951402153 |
| 21 | 188153927303168 |