193594domain: NAppears in sequencesNumber of conjugate-congruent partitions of n.at n=58A137438Number of down-arrow-indecomposable topologies on n labeled points.at n=5A247659Semiprimes A001358(k) = p*q such that p*q+p+q and r*s+r+s are consecutive primes, where A001358(k+1)=r*s.at n=25A330478