L.g.f.: log(Product_{k>=1} 1/(1 - x^k/(1 - x))) = Sum_{k>=1} a(k)*x^k/k.

Terms

a(0) =1a(1) =5a(2) =13a(3) =29a(4) =56a(5) =107a(6) =197a(7) =365a(8) =679a(9) =1280a(10) =2432a(11) =4679a(12) =9075a(13) =17729a(14) =34823a(15) =68701a(16) =135967a(17) =269765a(18) =536200a(19) =1067284a(20) =2126648a(21) =4240978a(22) =8462667a(23) =16895039a(24) =33742281a(25) =67408931a(26) =134697820a(27) =269204657a(28) =538104774a(29) =1075723097