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 one, three, four, five or six distinct values for every i,j,k<=n.
A211579
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 one, three, four, five or six distinct values for every i,j,k<=n.
Terms
- a(0) =17a(1) =61a(2) =185a(3) =505a(4) =1301a(5) =3279a(6) =8057a(7) =19877a(8) =48327a(9) =119027a(10) =289945a(11) =717461a(12) =1757523a(13) =4374935a(14) =10781761a(15) =26985609a(16) =66861615a(17) =168098793a(18) =418354859a(19) =1055489197a(20) =2636379211a(21) =6669352191a(22) =16707630313a(23) =42352772917a(24) =106355179479a(25) =270028712725
External references
- oeis: A211579