91720

Appears in sequences

• a(n) = least m such that sum of m reciprocal primes starting with n-th prime is >1.at n=37A137368
• Number of defective (binary) heaps on 2n elements from the set {0,1} with exactly n defects.at n=15A372489
• Numbers x such that there exist two integers 0<x<=y and z>0 such that sigma(x)^2 = sigma(y)^2 = x^2 + y^2 + z^2.at n=12A385356