896780domain: NAppears in sequencesNumber of -3..3 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(-1)^(t+u+v)) having three, four, six, seven or eight distinct values for every i,j,k<=n.at n=8A211759p-INVERT of (0,1,0,1,0,1,...), where p(S) = 1 - S^3 - S^4.at n=26A291223