1755625

Appears in sequences

• 11-gonal (or hendecagonal) square numbers.at n=4A333641
• 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=52A379816
• a(n) is the denominator of the square of the n-th Lagrange number.at n=13A382099