41922

Appears in sequences

• Numbers n such that if x = sigma(n)-phi(n)+tau(n)-n then n = sigma(x)-phi(x)+tau(x)-x.at n=7A238229
• G.f. A(x) satisfies: 1 = ...(((((A(x) - x)^(1/2) - x^2)^(1/3) - x^3)^(1/4) - x^4)^(1/5) - x^5)^(1/6) -...- x^n)^(1/(n+1)) -..., an infinite series of nested n-th roots.at n=8A275754
• Numbers k for which rank of the elliptic curve y^2=x^3-k*x is 4.at n=30A309034