OFFSET
1,3
COMMENTS
Two squares sharing an edge have a right-angled connection if they do not lie in the same plane.
Connections that are not right-angled (flat connections) may occur, but the polyominoids considered here must be connected through right-angled connections only.
LINKS
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Pontus von Brömssen, Oct 07 2023
STATUS
approved