136762

Appears in sequences

• Numbers k such that sigma(phi(k)) = sigma(k) where sigma is the sum of divisors function A000203 and phi is the Euler totient function A000010.at n=26A033631
• Let (A,B)=(a(2*n),a(2*n+1)), then (A,B) is (even,odd), gcd(A,B)=1 and A^2 + B^2 = 5^n. Note: a(0)=0.at n=30A098122
• Real part of (2 + i)^n, where i = sqrt(-1).at n=15A139011
• Values of y such that x^2 + y^2 = 5^n with x and y coprime and 0 < x < y.at n=14A230711