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

Terms

a(0) =1a(1) =1a(2) =4a(3) =10a(4) =29a(5) =72a(6) =200a(7) =510a(8) =1364a(9) =3546a(10) =9348a(11) =24400a(12) =64090a(13) =167562a(14) =439200a(15) =1149360a(16) =3010349a(17) =7879832a(18) =20633304a(19) =54014950a(20) =141422328a(21) =370239300a(22) =969323000a(23) =2537696160a(24) =6643839400a(25) =17393731933a(26) =45537549048a(27) =119218684970a(28) =312119004990a(29) =817137724392