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

Terms

a(0) =1a(1) =1a(2) =4a(3) =9a(4) =22a(5) =47a(6) =107a(7) =221a(8) =468a(9) =953a(10) =1932a(11) =3814a(12) =7560a(13) =14625a(14) =28192a(15) =53757a(16) =101827a(17) =190907a(18) =356362a(19) =659716a(20) =1215314a(21) =2224968a(22) =4053914a(23) =7346367a(24) =13260001a(25) =23822114a(26) =42629786a(27) =75991017a(28) =134991954a(29) =238948942