Number of reduced words of length n in Coxeter group on 20 generators S_i with relations (S_i)^2 = (S_i S_j)^4 = I.
A163124
Number of reduced words of length n in Coxeter group on 20 generators S_i with relations (S_i)^2 = (S_i S_j)^4 = I.
Terms
- a(0) =1a(1) =20a(2) =380a(3) =7220a(4) =136990a(5) =2599200a(6) =49316400a(7) =935712000a(8) =17753871510a(9) =336855735180
External references
- oeis: A163124