%I #6 Mar 30 2012 18:35:35
%S 1,1,2,6,20,70,243,889,3276,12276,46435,176869,677022,2602197,
%T 10033212,38787495,150286400,583434322,2268848988,8836447021,
%U 34461894010,134564992002,526025788992,2058359779051,8061905110548,31602659997975
%N Number of 2n-bead black-white reversible complementable strings with n black beads and fundamental period 2n.
%F Moebius transform of A045723 (Christian Bower).
%K nonn
%O 0,3
%A _David W. Wilson_