OFFSET
1,1
REFERENCES
Branko Grünbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987, Sections 2.7, 6.2 and 9.4.
LINKS
Gill Barequet and Minati De, A Lower Bound on the Growth Constant of Polyaboloes on the Tetrakis Lattice, International Computing and Combinatorics Conference (COCOON 2019): Computing and Combinatorics, 13-24.
CROSSREFS
KEYWORD
hard,nonn,changed
AUTHOR
Joseph Myers, Oct 15 2011
EXTENSIONS
a(21) from Johann Peters, Oct 31 2024
STATUS
approved