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

A211578

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

Terms

    a(0) =16a(1) =52a(2) =144a(3) =380a(4) =964a(5) =2456a(6) =6124a(7) =15508a(8) =38608a(9) =97780a(10) =243828a(11) =618200a(12) =1544572a(13) =3919940a(14) =9810928a(15) =24918052a(16) =62460100a(17) =158735704a(18) =398435148a(19) =1013116820a(20) =2546214544a(21) =6477456788a(22) =16299033172a(23) =41482468312a(24) =104500505308a(25) =266074661668

External references