Expansion of Product_{k>=1} (1 + x^k/(1 + x^(2*k)/(1 + x^(3*k)))).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =3a(7) =3a(8) =4a(9) =6a(10) =8a(11) =9a(12) =9a(13) =11a(14) =15a(15) =20a(16) =21a(17) =20a(18) =24a(19) =36a(20) =48a(21) =46a(22) =41a(23) =52a(24) =80a(25) =100a(26) =88a(27) =74a(28) =103a(29) =170