1687397

Appears in sequences

• Quasi-Carmichael numbers to exactly five bases.at n=12A257755
• Discriminant a(n) of the indefinite binary quadratic Markoff form m(n)*F_{m(n)}(x, y) with m(n) = A002559(n), for n >= 1.at n=10A305312
• a(n) is the numerator of the square of the n-th Lagrange number.at n=10A382098