2922925

Appears in sequences

• Expansion of g.f. (1+x-x^2)/((1-x)*(1-3*x)).at n=13A052909
• (11*9^n-1)/2.at n=6A198969
• Largest order of a rooted tree that does not contain a rooted caterpillar subtree of order n.at n=40A253062