%I #10 Apr 05 2017 11:28:36

%S 1,2,1,4,7,18,29,70,126,266,507,1054,2037,4158,8183,16488,32760,65790,

%T 131026,262654,524265,1049524,2097119,4196350,8388450,16781292,

%U 33554367,67116784,134217657,268451838,536870247,1073774590,2147483520

%N Number of n-bead black-white reversible strings with fundamental period n.

%F Moebius transform of A005418(n+1) (Christian Bower).

%Y Column 2 of A284871.

%K nonn

%O 0,2

%A _David W. Wilson_