Number of reduced words of length n in the Weyl group D_24.

Terms

a(0) =1a(1) =24a(2) =299a(3) =2576a(4) =17249a(5) =95656a(6) =457170a(7) =1934920a(8) =7396155a(9) =25914720a(10) =84197296a(11) =256013184a(12) =734002335a(13) =1996645640a(14) =5180091511a(15) =12874497504a(16) =30770197710a(17) =70952341040a(18) =158302199085a(19) =342599792520a(20) =720836052690