Number of distinct sets of the form J(P_s)\J(P_t) where s > t are two permutations of size n differing by a transposition and J(M) is the set of join-irreducible elements below M in the lattice of alternating sign matrices.

A391692

Number of distinct sets of the form J(P_s)\J(P_t) where s > t are two permutations of size n differing by a transposition and J(M) is the set of join-irreducible elements below M in the lattice of alternating sign matrices.