2724986880

Appears in sequences

• Coefficients of Chebyshev T polynomials: a(n) = A053120(n+8, n), n >= 0.at n=19A006974
• a(n) = 4^(n-1) * n! * Catalan(n-1) for n > 0, with a(0) = 0.at n=7A052734