52588

Appears in sequences

• Number of distinct n X 2 toroidal binary arrays.at n=9A184264
• G.f. satisfies A(x) = (1 + x^2)*(1 + x*A(x)^2).at n=10A215576
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 525", based on the 5-celled von Neumann neighborhood.at n=37A272740
• For 1<=x<=n, 1<=y<=n, write gcd(x,y) = u*x+v*y with u,v minimal; a(n) = n^4*s, where s is the population variance of the values of |u|.at n=12A345689