reviewed
approved
proposed
editing
Cf. A001700, A010050, A156992, A187535.
Cf. A001700, A010050, A156992.
a(n) = ceiling((((2*n)! / n!)^2) / 2). - _From_Reinhard Zumkeller_, Feb 16 2010: (Start)
a(n) = ceiling((((2*n)! / n!)^2) / 2).
a(n) = A001700(n-1) * A010050(n). - _Reinhard Zumkeller_, Feb 16 2010). (End)
a(n) = A001700(n-1) * A010050(n). - Reinhard Zumkeller, Feb 16 2010
Sum_{n>=0} 1/a(n) = 1 + StruveL(0, 1/2)*Pi/4, where StruveL is the modified Struve function. - Amiram Eldar, Dec 04 2022
