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 three, four, five, six or seven distinct values for every i,j,k<=n.
A211744
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 three, four, five, six or seven distinct values for every i,j,k<=n.
Terms
- a(0) =36a(1) =186a(2) =760a(3) =2676a(4) =8688a(5) =26700a(6) =79680a(7) =232312a(8) =667992a(9) =1901728a(10) =5370088a(11) =15113368a(12) =42292140a(13) =118400480a(14) =329954824a(15) =922231524a(16) =2567058088a(17) =7179940184a(18) =20000771140a(19) =56066665316a(20) =156499989480a(21) =440143385660
External references
- oeis: A211744