54841

Appears in sequences

• Number of (w,x,y,z) with all terms in {1,...,n} and w >= |x-y| + |y-z|.at n=19A212675
• Expansion of log'(1/2-sqrt((5*x+2*sqrt(1-4*x)-2)/x)/2).at n=7A243280
• Number of unlabeled rooted identity trees with n nodes in which the branches of any node with more than one branch have empty intersection.at n=17A316500