160395

Appears in sequences

• Number of 5-bead necklaces labeled with numbers -n..n not allowing reversal, with sum zero and first differences in -n..n.at n=24A208996
• Number of nonnegative integer matrices with sum of entries equal to n, no zero rows or columns, and distinct rows and columns.at n=7A321515
• a(n) = n^2*(2*n^2-23).at n=16A370109