Number of binary sequences of length n having exactly one conjugate at Hamming distance 2.

Terms

a(0) =0a(1) =2a(2) =0a(3) =0a(4) =0a(5) =12a(6) =0a(7) =32a(8) =0a(9) =140a(10) =0a(11) =264a(12) =0a(13) =868a(14) =0a(15) =1792a(16) =0a(17) =4464a(18) =0a(19) =9560a(20) =0a(21) =22484a(22) =0a(23) =47328a(24) =0a(25) =106444a(26) =0a(27) =225736a(28) =0a(29) =490380