1/4 the number of arrangements of n+1 nonzero numbers x(i) in -8..8 with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero.

A189950

1/4 the number of arrangements of n+1 nonzero numbers x(i) in -8..8 with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero.

Terms

    a(0) =20a(1) =103a(2) =1350a(3) =22220a(4) =327880a(5) =4678100a(6) =68081570a(7) =1012894742a(8) =15245829657a(9) =230937539015

External references