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, five, six or seven distinct values for every i,j,k<=n.
A211745
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, five, six or seven distinct values for every i,j,k<=n.
Terms
- a(0) =37a(1) =199a(2) =837a(3) =3035a(4) =10269a(5) =32847a(6) =102819a(7) =313745a(8) =947713a(9) =2825647a(10) =8369459a(11) =24617169a(12) =72044205a(13) =210094481a(14) =610184603a(15) =1769811737a(16) =5115685645a(17) =14790124015a(18) =42632437319a(19) =123051586369a(20) =354203684259
External references
- oeis: A211745