Origin of a story about a computer in the 50's recommending offing Pensioners
The story is clearly made up. 

There was no AI in the 1950's that could have come up with that. 

There is no AI today and for many years that could come up with that. 

Actually, an AI wouldn't come up with this idea at all. You would need a very well calibrated combination of AI and AS (Artificial Stupidity) to achieve this result.