Number of strings of n numbers x(i) in -8..8 with sums of x(i) and of x(i)*x(i+1) both zero.

A183943

Number of strings of n numbers x(i) in -8..8 with sums of x(i) and of x(i)*x(i+1) both zero.

Terms

    a(0) =1a(1) =1a(2) =17a(3) =69a(4) =1417a(5) =9335a(6) =135793a(7) =1639099a(8) =23586625a(9) =323498939a(10) =4919390397a(11) =73971159473

External references