64517

Appears in sequences

• a(n) = 4*prime(n)^2+1.at n=30A060429
• Numbers of the form n^2 + 1 without prime divisors of the form a^2 + 1.at n=24A217279
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 779", based on the 5-celled von Neumann neighborhood.at n=7A273539
• Values of terms in A380837 which are not in A379066.at n=24A380838