534743

Appears in sequences

• a(n) is the number of squarefree composite k with lpf(k) = prime(n) such that m <= Omega(k), where lpf = A020639, m = floor(log k / log lpf(k)), and Omega = A001222.at n=15A377793
• Triprimes that are the concatenation of three consecutive primes in reverse order.at n=3A384636