OFFSET
1,2
COMMENTS
From Vicher's table.
This gives the number of polyominoes of order 2n that can be tiled by dominoes in at least one way. - Joseph Myers, Jun 10 2012
LINKS
M. Keller, Counting Polyforms
Herman Tulleken, Polyominoes 2.2: How they fit together, (2019).
M. Vicher, Polyforms
FORMULA
CROSSREFS
KEYWORD
hard,more,nonn
AUTHOR
James A. Sellers, Aug 28 2000
EXTENSIONS
Edited by T. D. Noe, Apr 09 2009
Offset corrected and a(6)-a(9) added by Joseph Myers, Jun 10 2012
STATUS
approved