Expansion of Product_{k>=1} 1/(1 - 3^(k-1)*x^k).

Terms

a(0) =1a(1) =1a(2) =4a(3) =13a(4) =49a(5) =157a(6) =589a(7) =1885a(8) =6826a(9) =22378a(10) =78754a(11) =256630a(12) =904711a(13) =2934247a(14) =10133851a(15) =33287620a(16) =113522089a(17) =370582069a(18) =1262300701a(19) =4110883510a(20) =13869616495a(21) =45364050184a(22) =151708228636a(23) =494743296757