24857

Appears in sequences

• Centered octahedral numbers (crystal ball sequence for cubic lattice).at n=26A001845
• a(n) = prime(x) - pi(x) where x is the least x such that (prime(x+1) - pi(x+1)) - (prime(x) - pi(x)) = n.at n=38A111183
• Sum of the squares of the quadratic residues of prime(n).at n=15A125613
• Number of Dyck n-paths all of whose ascents and descents have lengths equal to 1 (mod 7).at n=31A212366
• Number of (3+1) X (n+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)+x(i-1,j) in the j direction.at n=15A250758
• Sum of numerator and denominator in a rational approximation j/k of q = log(2)/log(3), such that abs(j/k - q) is a new minimum.at n=17A355513
• Sum of numerator and denominator in a rational approximation j/k of q = log(2)/log(3), such that q - j/k is a new minimum, i.e., q is approximated from below.at n=25A355514