70364

Appears in sequences

• a(n) = 2*a(n-1) + a(floor(n/2)), with a(1) = 1, a(2) = 2.at n=15A033490
• Numbers x such that there exist three integers 0<x<=y<=z and t>0 such that sigma(x)^2 = sigma(y)^2 = sigma(z)^2 = x^2 + y^2 + z^2 + t^2.at n=34A385531