190512000

Appears in sequences

• Numbers k with the property that in the prime factorization of k all prime exponents are prime, their sum is also prime and equals the sum of distinct prime factors of k.at n=11A071837
• a(n) = Product_{k=1..n} prime(k)^prime(n-k+1).at n=4A087315
• A triangular sequence of coefficients from a Laplace Transform of a Bernoulli expansion function: LaplaceTransform[t*Exp[x*t]/(Exp[t] - 1), t, 1/t] = Zeta[2,1+1/t-x]->shifted to Zeta[5,1+1/t-x].at n=29A137498
• Highly powerful numbers (A005934) that are not cubeful (A036966).at n=8A307703
• Numbers k of the form p_1^p_m * p_2^p_(m-1) * ... * p_(m-1)^p_2 * p_m^p_1 for increasing primes p_i.at n=19A334633
• a(n) = Product_{d|n} lcm(d, sigma(d)) where sigma(k) is the sum of divisors of k (A000203).at n=19A334805