7488432

Appears in sequences

• a(n) = 3*binomial(2*n, n-1).at n=12A062561
• Sum of root degrees of all symmetric ordered trees with n edges.at n=23A143360
• Expansion of 72*x^2 / (1 - 323*x + 323*x^2 - x^3).at n=3A157459