Expansion of Sum_{i>=1} i*x^i/(1 - x) * Product_{j=1..i} 1/(1 - x^j).

Terms

a(0) =0a(1) =1a(2) =4a(3) =10a(4) =22a(5) =42a(6) =77a(7) =131a(8) =217a(9) =345a(10) =537a(11) =812a(12) =1211a(13) =1767a(14) =2547a(15) =3615a(16) =5078a(17) =7043a(18) =9687a(19) =13185a(20) =17815a(21) =23867a(22) =31766a(23) =41972a(24) =55146a(25) =71997a(26) =93519a(27) =120813a(28) =155358a(29) =198811