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 | 279936 |
| 3 | 31381059609 |
| 4 | 1125899906842624 |
| 5 | 1152921504606846976 |
| 6 | 4722366482869645213696 |
| 7 | 42391158275216203514294433201 |
| 8 | 324518553658426726783156020576256 |