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

Terms

a(0) =1a(1) =0a(2) =2a(3) =1a(4) =4a(5) =2a(6) =6a(7) =4a(8) =9a(9) =6a(10) =12a(11) =9a(12) =16a(13) =12a(14) =20a(15) =16a(16) =25a(17) =20a(18) =30a(19) =25a(20) =36a(21) =30a(22) =42a(23) =36a(24) =49a(25) =42a(26) =56a(27) =49a(28) =64a(29) =56