522242

Appears in sequences

• Unbalanced strings of length n.at n=19A027556
• Number of pairs of polynomials (f,g) in GF(2)[x] satisfying 1 <= deg(f) <= n, 1 <= deg(g) <= n and gcd(f,g) = 1.at n=9A087291
• Initial values for f(x)=phi(sigma(x)) such that iteration of f ends in a cycle of length 18.at n=10A096890
• Half the number of n X n toroidal binary arrays with each element having the sum of its vertical neighbors equal to the sum of its horizontal neighbors.at n=17A184096
• Numbers that are the sum of three biquadrates (fourth powers) in more than one way.at n=27A193244
• Number of Dyck n-paths all of whose ascents have prime lengths.at n=18A210737
• Number of nX2 0..1 arrays with every repeated value in every row and column unequal to the previous repeated value, and new values introduced in row-major sequential order.at n=16A267638