311636

Appears in sequences

• Number of unlabeled rooted trees with n nodes such that the minimal outdegree of inner nodes equals 5.at n=39A244459
• For 1<=x<=n, 1<=y<=n with gcd(x,y)=1, write 1 = gcd(x,y) = u*x+v*y with u,v minimal; a(n) = m^2*s, where s is the population variance of the values of |v| and m is the number of such values.at n=19A345695