Number of n-length words over a 7-ary alphabet {a_1,a_2,...,a_7} avoiding consecutive letters a_i, a_{i+1}.

A277670

Number of n-length words over a 7-ary alphabet {a_1,a_2,...,a_7} avoiding consecutive letters a_i, a_{i+1}.

Terms

    a(0) =1a(1) =7a(2) =43a(3) =264a(4) =1621a(5) =9953a(6) =61112a(7) =375231a(8) =2303939a(9) =14146313a(10) =86859145a(11) =533319959a(12) =3274614074a(13) =20106311704a(14) =123453866991a(15) =758013577995

External references