Boolean-Narayana numbers refine Boolean-Catalan numbers via an explicit formula with proven unimodality, log-concavity, real roots, and a three-term recurrence for their generating polynomials.
B´ ona, Symmetry and unimodality in t -stack sortable p ermutations
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Boolean-Narayana numbers
Boolean-Narayana numbers refine Boolean-Catalan numbers via an explicit formula with proven unimodality, log-concavity, real roots, and a three-term recurrence for their generating polynomials.