Molien series for 3-dimensional group [2+,n ] = 2*(n/2).

Terms

a(0) =1a(1) =0a(2) =2a(3) =0a(4) =3a(5) =0a(6) =4a(7) =1a(8) =5a(9) =2a(10) =6a(11) =3a(12) =8a(13) =4a(14) =10a(15) =5a(16) =12a(17) =6a(18) =14a(19) =8a(20) =16a(21) =10a(22) =18a(23) =12a(24) =21a(25) =14a(26) =24a(27) =16a(28) =27a(29) =18