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 | 0 |
| 1 | 1 |
| 2 | 16 |
| 3 | 162 |
| 4 | 768 |
| 5 | 3125 |
| 6 | 10368 |
| 7 | 31213 |
| 8 | 86016 |
| 9 | 223074 |
| 10 | 550000 |
| 11 | 1303049 |
| 12 | 2985984 |
| 13 | 6654713 |
| 14 | 14482832 |
| 15 | 30881250 |
| 16 | 64684032 |
| 17 | 133383037 |
| 18 | 271257984 |
| 19 | 544872101 |
| 20 | 1082400000 |
| 21 | 2128789026 |
| 22 | 4148908016 |
| 23 | 8019403537 |
| 24 | 15383789568 |
| 25 | 29306640625 |
| 26 | 55473687568 |
| 27 | 104384578338 |