590400

Appears in sequences

• Number of 9 X 9 arrays of squares of integers, symmetric under 90-degree rotation, with all rows summing to n.at n=28A156401
• Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 28.at n=5A156488
• Define the array k(n,x) = number of m such that tau(gcd(n,m)) is x where m runs from 1 to n. Also define h(n,x) = Sum_{d|n : tau(d) = x} d. The sequence contains numbers n such that k(n,x)*x = h(n,x) has at least one solution x.at n=28A197099
• The greedy sequence of real numbers at least 1 that do not contain any 4-term geometric progressions with integer ratio.at n=27A235055