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 four, five, six or seven distinct values for every i,j,k<=n.
A211584
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 four, five, six or seven distinct values for every i,j,k<=n.
Terms
- a(0) =16a(1) =48a(2) =128a(3) =302a(4) =704a(5) =1622a(6) =3696a(7) =8626a(8) =19784a(9) =47062a(10) =109280a(11) =264218a(12) =620192a(13) =1517126a(14) =3588888a(15) =8847682a(16) =21038192a(17) =52125406a(18) =124356752a(19) =309096434a(20) =738979400a(21) =1840516550a(22) =4406202720a(23) =10988503498a(24) =26329344800a(25) =65717431510a(26) =157552717784
External references
- oeis: A211584