65017

Appears in sequences

• Numbers x such that sigma(x)-x divides x-1, other than prime powers.at n=16A059047
• Sum of the squares of the quadratic residues of prime(n).at n=21A125613
• Row sums of exponential Riordan array [1+x*arctanh(x), x], A166357.at n=9A166358
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 643", based on the 5-celled von Neumann neighborhood.at n=7A273313
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 705", based on the 5-celled von Neumann neighborhood.at n=7A273418