3565918

Appears in sequences

• Imaginary part of (1+2i)^n.at n=19A006496
• 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=38A098122
• Values of y such that x^2 + y^2 = 5^n with x and y coprime and 0 < x < y.at n=18A230711