Expansion of Product_{k>=1} 1/(1 - x^k)^(mod(k,3)).

Terms

a(0) =1a(1) =1a(2) =3a(3) =3a(4) =7a(5) =9a(6) =15a(7) =20a(8) =31a(9) =41a(10) =61a(11) =79a(12) =113a(13) =146a(14) =201a(15) =260a(16) =349a(17) =447a(18) =589a(19) =748a(20) =972a(21) =1226a(22) =1571a(23) =1968a(24) =2495a(25) =3106a(26) =3900a(27) =4825a(28) =6008a(29) =7392