-27594domain: ZAppears in sequencesResult of using the positive integers 1,2,3,... as coefficients in an infinite polynomial series in x and then expressing this series as Product_{k>=1} (1+a(k)x^k).at n=37A147654Expansion of a(q) * b(q)^3 in powers of q where a(), b() are cubic AGM theta functions.at n=20A215711