300417

Appears in sequences

• Number of zero-sum -4..4 arrays of n elements with adjacent element differences also in -4..4.at n=7A202248
• The number of irreducible zero-sum subsets of T(n) = {-2*n+1, -2*n+3, ..., -3, -1, 1, 3, ..., 2*n-3, 2*n-1} that contain -2*n+1 but not 2*n-1.at n=25A390083