4465125

Appears in sequences

• a(n) = Product_{k=1..n} (2k-1)!!.at n=5A057863
• a(n) = n! / A003040(n).at n=14A082914
• a(n) = 1/h(n) where {h(n)} is the Hankel transform of {t(n)}; t(n) is defined by the expansion of tan(x)= Sum_n>0, t(n)*x^(2*n-1); |x|<Pi/2.at n=2A089626
• Duplicate of A082914.at n=14A092031
• Triangle read by rows: numerators of coefficients of the Debye-type polynomial u_n used for asymptotic Airy-type expansions of Bessel functions of arbitrary large order.at n=10A144617
• Triangular sequence from coefficients of the polynomial recursion: p(x,n)=Sum[Binomial[n, m]*p[x, m]*p[x, n - m - 1], {m, 0, n - 1}].at n=33A157526
• T(n,m), denominators of coefficients in a power/Fourier series expansion of the plane pendulum's exact differential time dependence.at n=31A274078
• a(n) is the least number that is the product of n primes (not necessarily distinct) and is the sum of n consecutive primes, or 0 if there are none.at n=10A339269