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, seven or eight distinct values for every i,j,k<=n.
A211757
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, seven or eight distinct values for every i,j,k<=n.
Terms
- a(0) =36a(1) =154a(2) =576a(3) =2024a(4) =6800a(5) =22568a(6) =73472a(7) =240760a(8) =780588a(9) =2570304a(10) =8389972a(11) =27928068a(12) =92072644a(13) =310034916a(14) =1031933696a(15) =3509571076a(16) =11773984392a(17) =40357220784a(18) =136211521048a(19) =469619503208
External references
- oeis: A211757