At a 1978 conference in Marseille, Apéry presented a proof that

When asked where his complex formulas came from, he famously replied, "They grow in my garden".

It appears in quantum electrodynamics , specifically relating to the anomalous magnetic moment of the electron. The "Miraculous" 1978 Proof

His presentation was disorganized and featured "unlikely assertions" that many attendees initially dismissed as a prank.