-92672domain: ZAppears in sequencesExpansion of 3 * b(q^2) * c(q^2) / c(q)^2 in powers of q where b(), c() are cubic AGM theta functions.at n=31A261576Product_{n>=1} 1 / (1 - a(n)*x^n/n!) = 1 + arctanh(x).at n=7A353928