Product_{n>=1} 1 / (1 - x^(2*n))^(a(n)/(2*n)!) = cosh(x).
A354064
Product_{n>=1} 1 / (1 - x^(2*n))^(a(n)/(2*n)!) = cosh(x).
Terms
- a(0) =1a(1) =-8a(2) =-104a(3) =1408a(4) =-354944a(5) =47546368a(6) =-6204652544a(7) =68669145088
External references
- oeis: A354064