37748713domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = the least positive integer k such that Omega(n+k) = Omega(k)+n, where Omega(m) (A001222) denotes the number of prime factors of m, counting multiplicity.at n=22A076158Least prime p such that p+n is product of (n+1) primes (with multiplicity).at n=23A255092Prime numbersat n=2304654