Number of reduced words of length n in Coxeter group on 40 generators S_i with relations (S_i)^2 = (S_i S_j)^21 = I.
A168909
Number of reduced words of length n in Coxeter group on 40 generators S_i with relations (S_i)^2 = (S_i S_j)^21 = I.
Terms
- a(0) =1a(1) =40a(2) =1560a(3) =60840a(4) =2372760a(5) =92537640a(6) =3608967960a(7) =140749750440
External references
- oeis: A168909