OFFSET
0,2
COMMENTS
A polyomino of shape I is a rectangle of width 1.
LINKS
Andrew Howroyd, Table of n, a(n) for n = 0..200
Wikipedia, Polyomino
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Feb 02 2015
EXTENSIONS
Terms a(11) and beyond from Andrew Howroyd, Dec 23 2019
STATUS
approved