Number of -1..1 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 two, three, four, five or six distinct values for every i,j,k<=n.
A211530
Number of -1..1 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 two, three, four, five or six distinct values for every i,j,k<=n.
Terms
- a(0) =8a(1) =22a(2) =56a(3) =124a(4) =270a(5) =560a(6) =1156a(7) =2336a(8) =4714a(9) =9418a(10) =18812a(11) =37400a(12) =74374a(13) =147596a(14) =293042a(15) =581384a(16) =1154070a(17) =2290670a(18) =4549186a(19) =9036466a(20) =17959458a(21) =35705544a(22) =71021240a(23) =141319688a(24) =281322224a(25) =560223850a(26) =1116045988a(27) =2224048908a(28) =4433497296
External references
- oeis: A211530