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

A211725

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

Terms

    a(0) =37a(1) =79a(2) =145a(3) =289a(4) =549a(5) =1083a(6) =2101a(7) =4151a(8) =8145a(9) =16131a(10) =31837a(11) =63151a(12) =125013a(13) =248203a(14) =492161a(15) =977771a(16) =1940909a(17) =3858087a(18) =7664741a(19) =15243819a(20) =30305953a(21) =60305099a(22) =119969501a(23) =238849543a(24) =475449301a(25) =947060219a(26) =1886258177a(27) =3759082587

External references