%I
%S 1,1,3,6,12,36,60,209,387,1054,1468,6895,7001,23920,49496,126732,
%T 146046,638800,647502,2772935,4162861
%N Number of polyhexes with n cells that tile the plane by translation.
%D Branko Grünbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987, Section 9.4.
%H Joseph Myers, <a href="http://www.polyomino.org.uk/mathematics/polyformtiling/">Polyhex tiling</a>
%Y Cf. A070766, A075208, A075209, A075210, A075211, A075212, A075213, A075214, A075215, A075198, A075216.
%K hard,nonn
%O 1,3
%A _Joseph Myers_, Sep 08 2002
%E More terms from _Joseph Myers_, Nov 08 2003
%E More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), May 05 2007
