I'm also trying to track own a story I read in 1970. It was about an alien android able to change it's appearance and looking for a mathematician. It found and managed to persuade the mathematician to accompany it to an off-world place where there was a timelock device. The mathematician figured out how to unlock the device and the android changed it's shape to a power tool of sorts to force the device open. It failed and, as it lay dying, it told the mathematician that it's creators were evil and dead as the timelock device could not be opened unless time ended for the creators.
I hope someone would remember this or a similar story and com up with the title and/or author.
I hope someone would remember this or a similar story and com up with the title and/or author.