Number of reduced words of length n in Coxeter group on 20 generators S_i with relations (S_i)^2 = (S_i S_j)^6 = I.
A163969
Number of reduced words of length n in Coxeter group on 20 generators S_i with relations (S_i)^2 = (S_i S_j)^6 = I.
Terms
- a(0) =1a(1) =20a(2) =380a(3) =7220a(4) =137180a(5) =2606420a(6) =49521790a(7) =940910400a(8) =17877229200a(9) =339666055200
External references
- oeis: A163969