278255

Appears in sequences

• Denominators of continued fraction convergents to sqrt(525).at n=9A042005
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/2 of the elements are <= sqrt(n).at n=33A048093
• a(n) = n^4 - 3*n^2 + 1.at n=23A057722
• a(n) = binomial(n+6,5) - 1.at n=28A062988
• Chebyshev polynomials S(n,23) with Diophantine property.at n=4A097778
• a(n) = (n - 1)*n*(2*n^2 + 4*n - 1)/6.at n=30A330700