52393

Appears in sequences

• Non-palindromic solutions to sigma(R(n)) = sigma(n), where R = A004086 is digit-reversal.at n=21A085329
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 901", based on the 5-celled von Neumann neighborhood.at n=33A273744
• Start of record gaps between sums of two squares.at n=14A297350
• a(n) = Sum_{k=1..n} floor(n/k) * (-4)^(k-1).at n=8A344819
• First occurrence of difference n between two consecutive terms of A000404. a(n) gives the lower term. The upper term is A355238.at n=24A355237
• G.f. A(x) satisfies A(x) = 1 + x/(1-x^2) * A(x)^3.at n=8A389196