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 or six distinct values for every i,j,k<=n.

A211576

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 or six distinct values for every i,j,k<=n.

Terms

    a(0) =16a(1) =48a(2) =124a(3) =294a(4) =680a(5) =1578a(6) =3600a(7) =8458a(8) =19460a(9) =46510a(10) =108280a(11) =262542a(12) =617264a(13) =1512270a(14) =3580596a(15) =8834026a(16) =21015224a(17) =52087762a(18) =124294096a(19) =308994090a(20) =738810308a(21) =1840241022a(22) =4405749912a(23) =10987766974a(24) =26328139088a(25) =65715472894a(26) =157549520692

External references