Number of primitive (=aperiodic) 4-ary words with length less than or equal to n which are earlier in lexicographic order than any other word derived by cyclic shifts of the alphabet.
A320088
Number of primitive (=aperiodic) 4-ary words with length less than or equal to n which are earlier in lexicographic order than any other word derived by cyclic shifts of the alphabet.
Terms
- a(0) =1a(1) =4a(2) =19a(3) =79a(4) =334a(5) =1339a(6) =5434a(7) =21754a(8) =87274a(9) =349159a(10) =1397734a(11) =5590954a(12) =22368169a(13) =89472934a(14) =357908119a(15) =1431633559a(16) =5726600854a(17) =22906403494a(18) =91625880229a(19) =366503524969
External references
- oeis: A320088