482160

Appears in sequences

• a(n) = Sum_{k=1..n-1} k^2*sigma(k)*sigma(n-k).at n=20A000477
• Number of ways to place 3 nonattacking grasshoppers on a toroidal chessboard of size n x n.at n=11A190398
• Number of 5X5X5 triangular 0..n arrays with every horizontal row nondecreasing, first elements of rows nonincreasing, last elements of rows nondecreasing, and every row having the same average value.at n=10A215185
• Triangle T(n,k) defined by Sum_{k=1..n} T(n,k)*u^k*x^n/n! = exp(Sum_{n>0} u*d(n)*x^n/n!), where d(n) is the number of divisors of n.at n=49A338870