127500

Appears in sequences

• Integer areas of the first Neuberg triangles of integer-sided triangles.at n=20A230758
• Convolution of Lucas and Jacobsthal numbers.at n=16A264038
• a(n) is the smallest integer k > n such that sqrt(1/n - 1/k) is a rational number; or 0 if no such k exists.at n=50A379816