27297738

Appears in sequences

• Large Schröder numbers (or large Schroeder numbers, or big Schroeder numbers).at n=12A006318
• a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ...+ a(n-2)*a(2) for n >= 3.at n=12A025240
• Expansion of (1 + x + sqrt(1 + 6*x + x^2))/2.at n=13A112478
• A bisection of A006318.at n=6A138462
• Expansion of (3 - x - sqrt(1 - 6*x + x^2))/2.at n=13A155069