SymmetrizedArrayRules
SymmetrizedArrayRules[sa] returns a list of rules posi -> vali of the symmetrized array sa.
SymmetrizedArrayRules[a, sym]returns a list of rules posi -> vali of the array a after being symmetrized with symmetry sym.
Examples
sa = SymmetrizedArray[{{1, 2} -> a, {2, 1} -> b}, {3, 3}, Symmetric[{1, 2}]];
SymmetrizedArrayRules[sa]Please visit the official Wolfram Language Reference for more details.