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

A211748

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

Terms

    a(0) =36a(1) =154a(2) =572a(3) =1960a(4) =6496a(5) =21240a(6) =68636a(7) =224172a(8) =727080a(9) =2404096a(10) =7887572a(11) =26445052a(12) =87756784a(13) =297663312a(14) =996763100a(15) =3410561676a(16) =11496724776a(17) =39585824560a(18) =134072951828a(19) =463716713452

External references