⊦ ¬ m < n ↔ n ≤ m
⊦ log2(2 * n + 1) = log2 n + 1, n = 0, ¬ 4 * 2 ^ log2 n ≤ 2 * n + 1
Used terms: 4 * 2 ^ log2 n, 2 * n + 1