265545

Appears in sequences

• Numbers n such that phi(sigma*(n)) = sigma*(phi(n)), where sigma*(n) is the sum of anti-divisors of n and phi(n) is the Euler totient function.at n=15A243996
• Expansion of e.g.f. exp(x^2 / (2 * (1 - x))) / (1 - x).at n=8A373770