347529

Appears in sequences

• Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AET = AlPO4-8 [Al36P36O144] starting with a T1 atom.at n=7A018948
• Numbers that are the sum of the divisors of two distinct coprime squares.at n=2A059113
• Intersection of A065764 and A065765: n such that x and y exist with sigma[x^2] = n = sigma[2*(y^2)].at n=13A065767
• Smallest odd number k such that sigma(x) = k has exactly n solutions.at n=2A123523
• Smallest odd number k such that sigma(x)=k has at least n solutions.at n=2A123524
• Sqrt(sigma(A008847(n)^2)), where A008847 lists m such that sigma(m^2) is a square.at n=17A163763
• Sqrt(sigma(A008847(n)^2)), where A008847 lists m such that sigma(m^2) is a square.at n=18A163763
• a(n) = sqrt(sigma(2*m^2)), where m = A097023(n), i.e., sigma(2*m^2) is a square.at n=16A163764