Number of -2..2 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 one, three, four, five, six or seven distinct values for every i,j,k<=n.

A211587

Number of -2..2 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 one, three, four, five, six or seven distinct values for every i,j,k<=n.

Terms

    a(0) =17a(1) =61a(2) =213a(3) =705a(4) =2293a(5) =7235a(6) =22491a(7) =68737a(8) =207725a(9) =621607a(10) =1846229a(11) =5452449a(12) =16029207a(13) =46976949a(14) =137331695a(15) =400884837a(16) =1168925307a(17) =3406992747a(18) =9928127547a(19) =28937875373a(20) =84376984733a(21) =246182651755a(22) =718778819599

External references