He could be literally anywhere. I've had a few escapees, one baby turned up on the top shelf of my rodent closet! I don't even know how she got up there. Dogs and cats are fantastic for finding escaped snakes, especially if they're bigger. How big is your corn?
We had one escape twice, and both times it escaped we couldn't find it until we completely rearranged the apartment - she showed up the next day cause obviously we'd disturbed her hiding spot. Rearranging/disturbing everything (carefully) might be worth a shot.