Number of conjugacy classes in Weyl group of type D_n.

Terms

a(0) =4a(1) =5a(2) =13a(3) =18a(4) =37a(5) =55a(6) =100a(7) =150a(8) =251a(9) =376a(10) =599a(11) =885a(12) =1355a(13) =1978a(14) =2944a(15) =4235a(16) =6160a(17) =8745a(18) =12484a(19) =17501a(20) =24589a(21) =34075a(22) =47233a(23) =64756a(24) =88695a(25) =120420a(26) =163210a(27) =219595a(28) =294828a(29) =393407