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

A045657

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

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =80a(6) =384a(7) =2352a(8) =9856a(9) =42840a(10) =169360a(11) =676720a(12) =2631072a(13) =10265216a(14) =39779600a(15) =154498280a(16) =599565952a(17) =2330826752a(18) =9068429544a(19) =35332969392a(20) =137817174800a(21) =538204065336

External references