232243200

Appears in sequences

• E.g.f. x^4/(1-2x).at n=10A052652
• Expansion of e.g.f. x^3*(1-x)/(1-2*x).at n=10A052671
• Triangle T(n,k) generalizing the tangent numbers.at n=25A064190
• a(1) = 10, a(n) = a(n-1) times the number of digits in a(n-1).at n=13A110804
• G.f.: Sum_{n>=0} (n-2*x)^n * x^n / (1 + n*x - 2*x^2)^n.at n=11A203799
• Irregular triangle T(n,m), denominators of coefficients in a power/Fourier series expansion of the plane pendulum's exact time dependence.at n=22A274131
• Array T(n, m) read by ascending antidiagonals: denominators of shifted Bernoulli numbers B(n, m) where m >= 0.at n=48A338874
• a(n) is the denominator of Sum_{k=0..n} (-1)^k / (k!)^2.at n=8A354305
• Triangle of denominators for rational convergents to Taylor series of 1/Gamma(x+1).at n=44A386676