The growth series for the affine Weyl group E_8.

Terms

a(0) =1a(1) =9a(2) =44a(3) =156a(4) =450a(5) =1122a(6) =2508a(7) =5149a(8) =9875a(9) =17910a(10) =31000a(11) =51567a(12) =82892a(13) =129330a(14) =196561a(15) =291880a(16) =424528a(17) =606067a(18) =850803a(19) =1176260a(20) =1603708a(21) =2158748a(22) =2871957a(23) =3779597a(24) =4924393a(25) =6356383a(26) =8133842a(27) =10324283a(28) =13005538a(29) =16266923