Number of reduced words of length n in the Weyl group E_7 on 7 generators and order 2903040.

Terms

a(0) =1a(1) =7a(2) =27a(3) =77a(4) =182a(5) =378a(6) =713a(7) =1247a(8) =2051a(9) =3205a(10) =4795a(11) =6909a(12) =9632a(13) =13040a(14) =17194a(15) =22134a(16) =27874a(17) =34398a(18) =41657a(19) =49567a(20) =58009a(21) =66831a(22) =75852a(23) =84868a(24) =93659a(25) =101997a(26) =109655a(27) =116417a(28) =122087a(29) =126497