346371666domain: NAppears in sequences1/4 the number of arrangements of n+1 nonzero numbers x(i) in -7..7 with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero.at n=7A1899491/4 the number of arrangements of 9 nonzero numbers x(i) in -n..n with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero.at n=6A189958