Expansion of Product_{k>=1} 1 / (1 - x^k)^(5^(k-1)).

Terms

a(0) =1a(1) =1a(2) =6a(3) =31a(4) =171a(5) =921a(6) =5031a(7) =27281a(8) =148101a(9) =801901a(10) =4336902a(11) =23415777a(12) =126254962a(13) =679805112a(14) =3655679442a(15) =19634501447a(16) =105334380517a(17) =564471596667