A subset of $\{1, 2, ..., 12\}$ is called trivoidant if no two elements of the subset differ by $3$. Enter the number of trivoidant subsets of $\{1, 2, ..., 12\}$.
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Tags: combinatorics, Subsets
A subset of $\{1, 2, ..., 12\}$ is called trivoidant if no two elements of the subset differ by $3$. Enter the number of trivoidant subsets of $\{1, 2, ..., 12\}$.