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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 4 |
| 3 | 9 |
| 4 | 64 |
| 5 | 125 |
| 6 | 2826 |
| 7 | 5047 |
| 8 | 218688 |
| 9 | 504009 |
| 10 | 32216950 |
| 11 | 39916811 |
| 12 | 7585223196 |
| 13 | 6227020813 |
| 14 | 2424646536326 |
| 15 | 1813027195995 |
| 16 | 1072898135852416 |
| 17 | 355687428096017 |
| 18 | 616925243565037854 |
| 19 | 121645100408832019 |
| 20 | 441395941479128984940 |
| 21 | 72313131901887676821 |