53084160

Appears in sequences

• Product of totient function: a(n) = Product_{k=1..n} phi(k) (cf. A000010).at n=14A001088
• Denominators of Bernoulli polynomials B(n)(x).at n=17A001898
• Number of 3-fold-free subsets of {1, 2, ..., n}.at n=29A050293
• Numbers that set records for number of ordered factorizations as A025487(j)*A025487(k).at n=35A182763
• a(n) = Product_{k=1..n} d(2*k), where d() is the number of divisors function A000005.at n=11A334767