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, two, three, four, five, six or seven distinct values for every i,j,k<=n.
A211747
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, two, three, four, five, six or seven distinct values for every i,j,k<=n.
Terms
- a(0) =49a(1) =343a(2) =1869a(3) =8659a(4) =35643a(5) =136121a(6) =494477a(7) =1736395a(8) =5955985a(9) =20088311a(10) =66948523a(11) =221182827a(12) =726211221a(13) =2373978133a(14) =7736949745a(15) =25168197671a(16) =81775419193
External references
- oeis: A211747