Number of binary vectors v of length n with curling number 1 such that the concatenation v v with first term omitted also has curling number 1.

A216958

Number of binary vectors v of length n with curling number 1 such that the concatenation v v with first term omitted also has curling number 1.

Terms

    a(0) =2a(1) =2a(2) =4a(3) =6a(4) =10a(5) =20a(6) =36a(7) =72a(8) =142a(9) =280a(10) =560a(11) =1114a(12) =2222a(13) =4436a(14) =8864a(15) =17718a(16) =35420a(17) =70824a(18) =141624a(19) =283210a(20) =566394a(21) =1132728a(22) =2265390a(23) =4530726a(24) =9061318a(25) =18122518a(26) =36244908a(27) =72489566a(28) =144978870a(29) =289957490

External references