Values of k in A080075. 1, 1, 1, 3, 1, 3, 1, 5, 3, 7, 1, 5, 3, 7, 1, 9, 5, 11, 3, 13, 7, 15, 1, 9, 5, 11, 3, 13, 7, 15, 1
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