170656

Appears in sequences

• a(n) = sum of squares of first n positive integers congruent to 1 mod 4.at n=31A024381
• Expansion of g.f. x*(x^4 - 5*x^3 + 10*x^2 - 12*x + 4)/((1-x)^2*(1 - 3*x + 2*x^2 - x^3)).at n=14A129080
• Number of secondary structures of size n having no stacks of length 1.at n=24A202840
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 181", based on the 5-celled von Neumann neighborhood.at n=34A279671