265289728

Appears in sequences

• Coefficients of Chebyshev polynomials: n*(2*n+1) * 4^(n-1).at n=10A002700
• a(n) = 2^(n-2)*binomial(n+1,2).at n=20A052482
• Sequence associated with a(n) = 2*a(n-1) + k*(k+2)*a(n-2).at n=21A080929
• Denominators of a BBP-like formula for 4*Pi/sqrt(27).at n=7A260659