418307

Appears in sequences

• Solutions to phi(x + omega(x)) = phi(x) + d(x), where phi() = A000010(), d() = A000005() and omega() = A001221().at n=18A063868
• Lesser of a pair (x,y) of consecutive terms of A045572 (numbers coprime to 2*5), both semiprimes and such that the prime factors of x are adjacent primes to the factors of y.at n=4A213605
• Numbers k such that k and k+2 have the same number (A000005) and sum of divisors (A000203).at n=29A229254
• The lesser of two semiprime brothers.at n=17A289548