Number of squarefree words of length n in a 7-ary alphabet.
A214941
Number of squarefree words of length n in a 7-ary alphabet.
Terms
- a(0) =7a(1) =42a(2) =252a(3) =1470a(4) =8610a(5) =50190a(6) =292740a(7) =1706250a(8) =9946020a(9) =57970080a(10) =337883700a(11) =1969343880a(12) =11478292770a(13) =66900843240a(14) =389929523550
External references
- oeis: A214941