501126

Appears in sequences

• Numbers n of the form (product of divisors of k)/(sum of divisors of k) for some k.at n=5A187942
• Number of 2 X 2 matrices with all elements in {0,1,...,n} and odd determinant.at n=33A210370
• Number of 2 X 2 matrices having all terms in {1,...,n} and odd determinant.at n=33A211065
• Product of divisors of n / sum of divisors of n for n such that product of divisors of n is divisible by sum of divisors of n.at n=6A244670
• Number of n X n 0..1 arrays with every element unequal to 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.at n=7A303630
• a(n) is the least positive integer k which is a multiple of prime(n) such that for some m >= 0, psi(k) = rad(k)^m, where psi(k) = A001615(k) and rad(k) = A007947(k).at n=6A355045
• Integers k such that for some m >= 0, psi(k) = rad(k)^m, where psi(k) = A001615(k) and rad(k) = A007947(k).at n=9A356420
• Square array read by antidiagonals upwards in which T(n,m) is the n-th number whose symmetric representation of sigma consists of m copies of unimodal pattern 121 (separated by 0's if m > 1).at n=19A372180