1854841

Appears in sequences

• Chebyshev polynomials S(n,11) + S(n-1,11) with Diophantine property.at n=6A097783
• Primitive part of A006190(n), n >= 1.at n=25A253807
• a(n) is the greatest divisor of A006190(n) that is coprime to A006190(m) for all positive integers m < n.at n=25A309525