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, four, six or eight distinct values for every i,j,k<=n.

A211749

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, four, six or eight distinct values for every i,j,k<=n.

Terms

    a(0) =48a(1) =230a(2) =950a(3) =3632a(4) =13422a(5) =48542a(6) =173584a(7) =620100a(8) =2210560a(9) =7933738a(10) =28500322a(11) =103284630a(12) =374776104a(13) =1371409876a(14) =5022197054a(15) =18526229324a(16) =68352157746a(17) =253717012028a(18) =941511432258

External references