4500000000

Appears in sequences

• Denominator of ((3 * n - 2)/(n^(2 * n - 1) * (2 * n - 1) * 4^(n - 1))).at n=4A067746
• a(n) = n^(n-2) * binomial(n,2).at n=10A081131
• 10th binomial transform of (0,0,1,0,0,0,...).at n=10A081140
• Numbers n such that the sum of all numbers formed by deleting one digit from n is equal to n.at n=21A131639
• Number of n-digit even numbers.at n=9A137233
• Number of shapes of balanced 10-ary trees with n nodes, where a tree is balanced if the total number of nodes in subtrees corresponding to the branches of any node differ by at most one.at n=19A229395
• Number of n-digit positive integers that are the product of two integers ending with 2.at n=10A346629