771147domain: NAppears in sequencesProducts of the 4th power of a prime and a distinct prime of power 3 (p^4*q^3).at n=27A179666Self-inverse permutation of natural numbers, "Blue code" conjugated by A156552 and its inverse: a(n) = A005940(1+A193231(A156552(n))).at n=61A332450