57130

Appears in sequences

• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 493", based on the 5-celled von Neumann neighborhood.at n=42A272545
• a(1)=1, a(2)=2, a(3)=3, a(4)=4, a(5)=5, a(n)=5*a(n-5)+4*a(n-4)+3*a(n-3)+2*a(n-2)+a(n-1).at n=13A286902
• Expansion of Product_{k>=1} (1 + x^k)^(sigma_1(k)-k), where sigma_1(k) = sum of divisors of k (A000203).at n=32A319107