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 | 25 |
| 2 | 3150 |
| 3 | 1956275 |
| 4 | 6105471900 |
| 5 | 95373537112525 |
| 6 | 7450675970460940650 |
| 7 | 2910390496349340822268775 |
| 8 | 5684344796471297836309816409400 |
| 9 | 55511156915602623492479419714357425025 |