Number of reduced words of length n in the Weyl group D_15.

Terms

a(0) =1a(1) =15a(2) =119a(3) =665a(4) =2939a(5) =10933a(6) =35580a(7) =103972a(8) =277950a(9) =689282a(10) =1602727a(11) =3523945a(12) =7376794a(13) =14784390a(14) =28500705a(15) =53054702a(16) =95687240a(17) =167682306a(18) =286218490a(19) =476893794a(20) =777106448a(21) =1240505775a(22) =1942759458a(23) =2988915740a(24) =4522669833a(25) =6737871614a(26) =9892634850a(27) =14326424875