Number of reduced words of length n in Coxeter group on 3 generators S_i with relations (S_i)^2 = (S_i S_j)^8 = I.

A164696

Number of reduced words of length n in Coxeter group on 3 generators S_i with relations (S_i)^2 = (S_i S_j)^8 = I.

Terms

    a(0) =1a(1) =3a(2) =6a(3) =12a(4) =24a(5) =48a(6) =96a(7) =192a(8) =381a(9) =756a(10) =1503a(11) =2988a(12) =5940a(13) =11808a(14) =23472a(15) =46656a(16) =92742a(17) =184353a(18) =366456a(19) =728439a(20) =1447986a(21) =2878296a(22) =5721456a(23) =11373072a(24) =22607316a(25) =44938668a(26) =89328777a(27) =177567132a(28) =352966731a(29) =701624856

External references