2 problems

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Recurrence conjecture for the first two diagonal entries of the volume triangle
Recurrence conjecture for $a_n$ and $b_n$ . The first diagonal entry satisfies
Conjectureopenenumerative-combinatorics polytope-volumes recurrencesarXiv posted 2 days ago
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Factorial-denominator conjecture for volumes of 321-avoiding permutation blocks
Let $\sigma$ be a block in the set $\mathfrak S_*(321)$ of 321-avoiding permutations, and let $\Pi_\sigma$ be its associated polytope. Write…
Conjectureopenpattern-avoidance permutations polytope-volumesarXiv posted 2 days ago

Recurrence conjecture for the first two diagonal entries of the volume triangle