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Number of fixed poly-[3^3.4^2]-tiles (polyhouses) (holes allowed) with n cells.
8

%I #13 Nov 22 2024 09:06:23

%S 2,5,16,57,212,817,3232,13018,53176,219680,915928,3848079,16271384,

%T 69183099,295561620,1267964967,5459626526

%N Number of fixed poly-[3^3.4^2]-tiles (polyhouses) (holes allowed) with n cells.

%D Branko Grünbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987, Sections 2.7, 6.2 and 9.4.

%H Brendan Owen, <a href="http://web.archive.org/web/20061229103147/http://members.optusnet.com.au/polyforms/2dforms/polyhouses/index.htm">Polyhouses</a>.

%Y Cf. A197156, A197157.

%K nonn,hard,more

%O 1,1

%A _Joseph Myers_, Oct 10 2011

%E a(16)-a(17) from _Johann Peters_, Nov 22 2024