-21642752domain: ZAppears in sequencesProduct_{n>=1} 1 / (1 - x^n)^(a(n)/n!) = 1 + sin(x).at n=11A354055Product_{n>=1} 1 / (1 - x^(2*n))^(a(n)/(2*n)!) = cos(x).at n=5A354063Product_{n>=1} (1 + x^(2*n))^(a(n)/(2*n)!) = cosh(x).at n=5A354174