193159

Appears in sequences

• Denominators of continued fraction convergents to sqrt(437).at n=9A041833
• a(n) = n^4 - 3*n^2 + 1.at n=21A057722
• Nonprime numbers k such that (k+1)*Sum_{d|k} 1/(d+1) is an integer.at n=24A069155
• Chebyshev polynomials S(n-1,21) with Diophantine property.at n=5A092499