cp's OEIS Frontend

A045667 Number of 2n-bead balanced binary strings of fundamental period 2n, rotationally equivalent to reverse, inequivalent to complement and reversed complement.

%I A045667 #9 Sep 14 2019 18:19:07
%S A045667 0,0,0,0,16,20,168,168,896,972,4600,4840,20880,22360,93744,99060,
%T A045667 405504,428876,1738080,1828104,7359600,7716240,30982864,32355664,
%U A045667 129654144,135002900,540570160,561187116,2245878544,2325812528
%N A045667 Number of 2n-bead balanced binary strings of fundamental period 2n, rotationally equivalent to reverse, inequivalent to complement and reversed complement.
%H A045667 Andrew Howroyd, <a href="/A045667/b045667.txt">Table of n, a(n) for n = 0..200</a>
%F A045667 a(n) = 2*n*A045685(n).
%F A045667 a(n) = A045662(n) - A045665(n). - _Andrew Howroyd_, Sep 14 2019
%Y A045667 Cf. A045662, A045665, A045685.
%K A045667 nonn
%O A045667 0,5
%A A045667 _David W. Wilson_