A363206 Number of polycubes with n cells, allowing edge connections as well as corner connections, identifying mirror images.
1, 2, 10, 113, 1772, 37390, 857772, 20629656
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.