1680000

Appears in sequences

• a(n) = n*(n-1)^4/2.at n=21A019583
• Third binomial transform of Fibonacci(3n)/Fibonacci(3).at n=8A093145
• Integer areas of the tangential triangles corresponding to the integer-sided triangles with integer areas.at n=21A230361
• Integer areas A of the integer-sided triangles such that the length of the inradius and the circumradius are both a perfect square.at n=10A232274