%I #11 May 16 2022 22:18:47

%S 3,6,14,36,99,281,816,2415,7260,22074,67743,209552,652566,2043672,

%T 6431715,20328504,64494678,205303537,655493697,2098500135,6734498816,

%U 21660087087

%N Number of fixed poly-[3.6.3.6]-tiles (holes allowed) with n cells (division into rhombi is significant).

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

%Y Cf. A197459, A197460.

%K hard,more,nonn

%O 1,1

%A _Joseph Myers_, Oct 15 2011

%E a(18)-a(22) from _Aaron N. Siegel_, May 16 2022