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

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =7a(6) =9a(7) =11a(8) =13a(9) =16a(10) =19a(11) =22a(12) =25a(13) =28a(14) =32a(15) =36a(16) =40a(17) =44a(18) =49a(19) =54a(20) =59a(21) =64a(22) =69a(23) =75a(24) =81a(25) =87a(26) =93a(27) =100a(28) =107a(29) =114