7702189345domain: NAppears in sequencesNumber of solutions to the equation x_1 + ... + x_n =0 satisfying -n<=x_i<=n (1<=i<=n).at n=9A286928Number of arrays of 9 integers in -n..n with sum zero.at n=9A322536Number of arrays of n integers in -9..9 with sum zero.at n=9A322539