Expansion of Product_{k>=1} 1/(1 - x^k)^(sigma_3(k)).

Terms

a(0) =1a(1) =1a(2) =10a(3) =38a(4) =156a(5) =534a(6) =2014a(7) =6796a(8) =23312a(9) =76165a(10) =247234a(11) =780343a(12) =2435903a(13) =7453859a(14) =22538336a(15) =67130594a(16) =197666509a(17) =574876417a(18) =1654464954a(19) =4711217687a(20) =13288453688a(21) =37133349758a(22) =102873771662a(23) =282630567325a(24) =770410193747