129020

Appears in sequences

• Counts where both the odd composites (starting from 1) 1 mod 4 and 3 mod 4 are equal.at n=16A093182
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 291", based on the 5-celled von Neumann neighborhood.at n=32A287501