721920

Appears in sequences

• Number of 4-step one or two collinear space at a time queen's tours on an n X n board summed over all starting positions.at n=16A187029
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 225", based on the 5-celled von Neumann neighborhood.at n=20A286963