OFFSET
1,2
COMMENTS
A polyhex is considered to be row convex if cells take contiguous positions in each row. (Multiple cells in a row are not connected.)
LINKS
EXAMPLE
The only pentahexes that are not row convex are the shallow V shape and its 180-degree rotation. So a(5) = A001207(5) - 2 = 184.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
David Bevan, Sep 18 2018
STATUS
approved