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, six or seven distinct values for every i,j,k<=n.
A211586
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, six or seven distinct values for every i,j,k<=n.
Terms
- a(0) =16a(1) =52a(2) =168a(3) =516a(4) =1560a(5) =4588a(6) =13272a(7) =37788a(8) =106040a(9) =294836a(10) =810304a(11) =2215196a(12) =6001792a(13) =16214140a(14) =43504736a(15) =116571316a(16) =310736008a(17) =828017772a(18) =2197752008a(19) =5835140044a(20) =15446573864a(21) =40919565540a(22) =108157976240a(23) =286166447228
External references
- oeis: A211586