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 two, four, five or six distinct values for every i,j,k<=n.
A211577
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 two, four, five or six distinct values for every i,j,k<=n.
Terms
- a(0) =24a(1) =108a(2) =294a(3) =702a(4) =1560a(5) =3464a(6) =7448a(7) =16498a(8) =35766a(9) =80586a(10) =178192a(11) =410044a(12) =925128a(13) =2169774a(14) =4976710a(15) =11850650a(16) =27515436a(17) =66271404a(18) =155211372a(19) =376977262a(20) =888276502a(21) =2170805230a(22) =5137041172a(23) =12612008268a(24) =29937248660a(25) =73756347602
External references
- oeis: A211577