375231domain: NAppears in sequencesNumber of n-length words over a 7-ary alphabet {a_1,a_2,...,a_7} avoiding consecutive letters a_i, a_{i+1}.at n=7A277670Number of n-length words over an n-ary alphabet {a_1,a_2,...,a_n} avoiding consecutive letters a_i, a_{i+1}.at n=7A277673