270525

Appears in sequences

• Number of nonnegative integer 3 X 3 matrices with sum of elements equal to n, up to rotational symmetry.at n=17A054771
• Triangle T(n,k) of n X n binary matrices with k=0..n^2 ones, up to rotational symmetry.at n=43A054772
• Number of intersection points when every pair of vertices of a row of n adjacent congruent rectangles are joined by an infinite line.at n=32A347750