1621564domain: NAppears in sequencesExpansion of Product_{k>=1} (1-x^k)^29.at n=10A010834Number 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 four, five, six or seven distinct values for every i,j,k<=n.at n=10A211742