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 | 2500 |
| 3 | 3600 |
| 4 | 62500 |
| 5 | 14379264 |
| 6 | 57760000 |
| 7 | 141376000000 |
| 8 | 245495475625 |
| 9 | 390625000000 |
| 10 | 943971582724 |
| 11 | 4482669527413081 |
| 12 | 8790937600000000 |
| 13 | 31561776563446336 |
| 14 | 10235319926865509025 |