4950000

Appears in sequences

• Numbers n that form a Pythagorean quadruple with n', n'' and sqrt(n^2 + n'^2 + n''^2), where n' and n'' are the first and the second arithmetic derivative of n.at n=14A230543
• Number of n-digit numbers that yield an (n+1)-digit number after Reverse and Add.at n=6A232730
• Wiener index of the n X n X n grid graph.at n=9A292045
• Number of nonzero digits needed to write all nonnegative n-digit integers.at n=5A358620