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A032311
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Number of ways to partition n labeled elements into sets of different sizes of at least 2.
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0
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0, 1, 1, 1, 11, 16, 57, 85, 1507, 2896, 12563, 51074, 138789, 2954407, 7959304, 38908797, 178913747, 1100724688, 3444477663, 114462103390, 358862880667, 2217915340389, 11257750157888, 73465378482214
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