3321120

Appears in sequences

• Triangle T(n,m) read by rows, obtained from [A(x)]^m = Sum_{n>=m} T(n,m)*x^n, where A(x) (the g.f. for A069271) satisfies 2*x^2*A(x)^3 = 1 - 2*x*A(x) - sqrt(1-4*x*A(x)).at n=70A188108
• a(n) = 5*binomial(4*n+10,n)/(2*n+5).at n=7A233667
• Number of dissections of a convex (4n+4)-sided polygon into n hexagons and one square (up to equivalence).at n=7A367872