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A035355
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"BHK" (reversible, identity, unlabeled) transform of A035353.
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1
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1, 1, 1, 2, 5, 15, 44, 140, 442, 1443, 4751, 15903, 53716, 183334, 630513, 2184417, 7614318, 26690344, 94015908, 332639104, 1181596784, 4212424485, 15066677338, 54050993664, 194438337125, 701224890628, 2534810109024
(list; graph; refs; listen; history; internal format)
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