82643

Appears in sequences

• Numbers k such that sigma(phi(sigma(k))) = phi(k).at n=15A066465
• Begin with a(0) = 3. Let a(n) for n > 0 be the smallest positive integer not yet in the sequence which forms part of a Primitive Pythagorean Triple (PPT) when paired with a(n-1).at n=35A239356