1/4 the number of arrangements of n+1 nonzero numbers x(i) in -5..5 with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero.

A189947

1/4 the number of arrangements of n+1 nonzero numbers x(i) in -5..5 with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero.

Terms

    a(0) =10a(1) =39a(2) =306a(3) =3247a(4) =31284a(5) =280284a(6) =2514945a(7) =23257218a(8) =219695998a(9) =2090461716a(10) =19931671853a(11) =190527865384

External references