login
A197157
Number of one-sided poly-[3^3.4^2]-tiles (polyhouses) (holes allowed) with n cells.
2
1, 4, 8, 34, 106, 430, 1616, 6594, 26588, 110188, 457964, 1925498, 8135692, 34597729, 147780810
OFFSET
1,2
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
Brendan Owen, Polyhouses (gives a(1)-a(10)).
CROSSREFS
Sequence in context: A149105 A149106 A149107 * A324410 A218628 A149108
KEYWORD
hard,nonn
AUTHOR
Joseph Myers, Oct 10 2011
STATUS
approved