Number of primitive (=aperiodic) ternary 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.
A320087
Number of primitive (=aperiodic) ternary 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) =3a(2) =11a(3) =35a(4) =115a(5) =347a(6) =1075a(7) =3235a(8) =9787a(9) =29387a(10) =88435a(11) =265315a(12) =796755a(13) =2390347a(14) =7173227a(15) =21519947a(16) =64566667a(17) =193700035a(18) =581120523a(19) =1743362283a(20) =5230145947a(21) =15690440099a(22) =47071499707a(23) =141214499227a(24) =423644035627
External references
- oeis: A320087