71769

Appears in sequences

• a(n) = Sum_{i=1..n-1} a(i)*a(n-1-i), with a(0) = 1, a(1) = 3.at n=10A014432
• Duplicate of A014432.at n=10A025236
• G.f.: 1/(1-x) = Sum_{n>=0} a(n)*x^n*Product_{k=1..n+1} (1-x^k).at n=35A209405
• The sixth Euler transform of the sequence with g.f. 1+x.at n=9A290355
• Number of 9-leaf rooted trees with n levels.at n=6A290363