617831552

Appears in sequences

• Numbers k such that sigma(k) + tau(k) is a prime.at n=27A064205
• Bhaskara twins: n such that 2*n^2 = X^3 and 2*n^3 = Y^2.at n=25A106318
• Dirichlet g.f.: Product_{k>=2} 1 / (1 - k^(-s))^(k^6).at n=25A343286