57019

Appears in sequences

• Number of equivalence classes of 4 X n binary matrices when one can permute rows, permute columns and complement columns.at n=21A006380
• Counts of Kekulean pericondensed planar benzenoid hydrocarbons (see reference for precise definition).at n=7A141787
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 675", based on the 5-celled von Neumann neighborhood.at n=34A273408