268419071

Appears in sequences

• Expansion of (1-3*x+3*x^2)/(1-5*x+10*x^2-10*x^3+4*x^4).at n=28A098179
• a(n) = 4^n - 2^n - 1.at n=14A156589
• 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 515", based on the 5-celled von Neumann neighborhood.at n=27A288828