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 | 1 |
| 2 | 81 |
| 3 | 400 |
| 4 | 32400 |
| 5 | 195938 |
| 6 | 224450 |
| 7 | 1705636 |
| 8 | 3648100 |
| 9 | 13645088 |
| 10 | 15870978 |
| 11 | 18180450 |
| 12 | 29184800 |
| 13 | 138156516 |
| 14 | 295496100 |
| 15 | 1055340196 |
| 16 | 1105252128 |
| 17 | 1476326929 |
| 18 | 2263475776 |
| 19 | 2323432804 |
| 20 | 2363968800 |
| 21 | 2592846400 |
| 22 | 2661528100 |
| 23 | 2686005218 |
| 24 | 2917410498 |
| 25 | 3564550178 |