Number of aperiodic binary necklaces of length n with no subsequence 00, excluding the necklace "0".

A006206

Number of aperiodic binary necklaces of length n with no subsequence 00, excluding the necklace "0".

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =2a(6) =4a(7) =5a(8) =8a(9) =11a(10) =18a(11) =25a(12) =40a(13) =58a(14) =90a(15) =135a(16) =210a(17) =316a(18) =492a(19) =750a(20) =1164a(21) =1791a(22) =2786a(23) =4305a(24) =6710a(25) =10420a(26) =16264a(27) =25350a(28) =39650a(29) =61967

External references