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Nov
15
comment How many ways to merge N companies into one big company: Bell or Catalan?
Could someone please explain the first (n+2)*M(n) term in second equation of Edit2? M(n+1) = (n+2)M(n) + ... Shouldn't it be simply M(n) as it corrresponds to the case when firstly all n elements are merged together then the n+1th element is merged in possibly only one way.
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asked Counting (Number theory / Factors)