Fibonacci sequence
Concept
A sequence where each number is the sum of the two preceding ones, often used as an example for recursive programming.
Mentioned in 3 videos
Videos Mentioning Fibonacci sequence

Building an Engineering Team by Ammon Bartram and Harj Taggar
Y Combinator
The solution to a sample interview question about counting paths on stairs, used to illustrate a question that might have a 'giveaway' answer.

Subroutines in Low Level Code - Computerphile
Computerphile
A sequence where each number is the sum of the two preceding ones, often used as an example for recursive programming.

We Live in a Simulation. The evidence is everywhere. All you have to do is look.
The Why Files
A mathematical sequence where each number is the sum of the two preceding ones, found extensively in nature and cited as evidence for patterns in the universe consistent with a program.