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A197158
Number of fixed poly-[3^3.4^2]-tiles (polyhouses) (holes allowed) with n cells.
2
2, 5, 16, 57, 212, 817, 3232, 13018, 53176, 219680, 915928, 3848079, 16271384, 69183099, 295561620
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.
CROSSREFS
Sequence in context: A180678 A072110 A323229 * A188314 A114296 A121689
KEYWORD
hard,nonn
AUTHOR
Joseph Myers, Oct 10 2011
STATUS
approved