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A197467
Number of fixed poly-[4.8^2]-tiles (holes allowed) with n cells (division into triangles is significant).
2
4, 6, 12, 25, 56, 132, 320, 792, 1976, 4962, 12576, 32140, 82704, 214044, 556576, 1453210, 3808592, 10015134, 26413468, 69844263, 185126524
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
Sequence in context: A037100 A095969 A090608 * A256350 A215177 A294489
KEYWORD
hard,nonn,changed
AUTHOR
Joseph Myers, Oct 15 2011
EXTENSIONS
a(21) from Johann Peters, Oct 31 2024
STATUS
approved