518560domain: NAppears in sequencesNumber of -7..7 arrays x(0..n-1) of n elements with zero sum, and adjacent elements not equal modulo three (with -1 modulo 3 = 2).at n=6A199908Number of -n..n arrays x(0..6) of 7 elements with zero sum, and adjacent elements not equal modulo three (with -1 modulo 3 = 2).at n=6A199914