Number of reduced words of length n in Coxeter group on 4 generators S_i with relations (S_i)^2 = (S_i S_j)^12 = I.
A166468
Number of reduced words of length n in Coxeter group on 4 generators S_i with relations (S_i)^2 = (S_i S_j)^12 = I.
Terms
- a(0) =1a(1) =4a(2) =12a(3) =36a(4) =108a(5) =324a(6) =972a(7) =2916a(8) =8748a(9) =26244a(10) =78732a(11) =236196a(12) =708582a(13) =2125728a(14) =6377136a(15) =19131264a(16) =57393360a(17) =172178784a(18) =516532464a(19) =1549585728a(20) =4648722192a(21) =13946061600a(22) =41837869872a(23) =125512664832a(24) =376535160174
External references
- oeis: A166468