Solution 59: Recursion and Hidden Fibonacci Sequence
- Published on Sep 27, 2018
- We use creative counting methods--recursion and one-to-one correspondence--to count the number of 9-digit (and 2001-digit) integers that satisfy the constraints.
Congratulations to Walker Powell, attyfarbuckle, Kevin Tong, GreenMeansGO, CymoTec, Seth Harwood, Nicola C, Sean Skelly, SeongKyun Jung, and Bigg Barbarian for successfully solving this math challenge question! Walker Powell was the first person to solve the question.
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