Number 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 two, three, four, six or seven distinct values for every i,j,k<=n.
A211740
Number 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 two, three, four, six or seven distinct values for every i,j,k<=n.
Terms
- a(0) =48a(1) =238a(2) =814a(3) =2424a(4) =6888a(5) =19070a(6) =52124a(7) =142276a(8) =386732a(9) =1058996a(10) =2893626a(11) =7993242a(12) =22024912a(13) =61440284a(14) =170755404a(15) =480735696a(16) =1346455548a(17) =3821566724a(18) =10775254120a(19) =30797445968a(20) =87331368670a(21) =251116424714a(22) =715543269216
External references
- oeis: A211740