Number of maximal squarefree words of length n over the alphabet {0,1,2}.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =6a(7) =0a(8) =0a(9) =0a(10) =6a(11) =6a(12) =6a(13) =6a(14) =24a(15) =24a(16) =24a(17) =36a(18) =54a(19) =54a(20) =120a(21) =138a(22) =216a(23) =240a(24) =384a(25) =444a(26) =528a(27) =690a(28) =966a(29) =1236