101007559

Appears in sequences

• Numerator of 2^n*(3*n-3)!/( ((n-1)!)^3 * (2*n)! ).at n=18A004677
• Numerator of 2^n*(3*n-3)!/( ((n-1)!)^3 * (2*n)! ).at n=19A004677
• a(n) = least k with n distinct prime factors such that floor(log_q(k)) = floor(log_p(k))-1, where p is the smallest prime factor of k, and q is any other distinct prime factor of k.at n=5A381250
• Numbers k such that omega(k) = 5 and p^omega(k) < k^(1/5) < lpf(k)^(omega(k)+1) for all primes p | k such that p > lpf(k), where lpf = A020639(k).at n=0A383179