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 | 1152921504606846976 |
| 2 | 42391158275216203514294433201 |
| 3 | 867361737988403547205962240695953369140625 |
| 4 | 508021860739623365322188197652216501772434524836001 |