A365353 Number of free corner-connected 4-dimensional polyhypercubes with n cells.
1, 1, 4, 23, 207, 2794
Offset: 1
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.