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MathNet 2011 Question 98

Math Olympiad Vault · MathNet 2011

Question 98

Let $g(n)$ be the number of all $n$-digit natural numbers each consisting only of the digits $0, 1, 2, 3$ (but not necessarily all of them) such that the sum of no two neighboring digits equals $2$.
Determine whether $g(2010)$ and $g(2011)$ are divisible by $11$.
(I. Kozlov)