Okay, who was the only other president to die in office who was NOT elected in a year ending in zero?

I've seen this before and I remember everyone talking about it when Reagan got elected in 1980.

He broke the trend. Oh and by the way, the president elected in 1800 & the one in 1820 did not die in office so that's a total of three

Lincoln was a great man and JFK was a complete scumbag.....