266382

Appears in sequences

• Number of ways to select a subset s from an n-set and then partition s into blocks of equal size.at n=12A262320
• Lexicographically earliest unbounded aliquot-like sequence based on the Dedekind psi function: a(1) = 318, a(n) = t(a(n-1)) where t(k) = A001615(k) - k.at n=30A323328