2186871697

Appears in sequences

• Numerators of a continued fraction for (3+sqrt(13))/2.at n=3A006273
• Main diagonal of triangle A100229.at n=18A100230
• Expansion of x*(3+x-x^3)/((1-3*x-x^2)*(1-x)*(1+x)).at n=18A212962
• Primitive part of A006190(n), n >= 1.at n=26A253807
• a(n) is the greatest divisor of A006190(n) that is coprime to A006190(m) for all positive integers m < n.at n=26A309525