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1, 6, 13, 19, 70, 89, 159, 407, 566, 7199, 137347, 1655363, 1792710, 5240783, 7033493, 12274276, 43856321, 56130597, 156117515, 992835687, 37883873621, 228296077413, 494476028447, 722772105860, 2662792346027
(list; graph; refs; listen; history; internal format)
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