Number of reduced words of length n in Coxeter group on 4 generators S_i with relations (S_i)^2 = (S_i S_j)^10 = I.
A165756
Number of reduced words of length n in Coxeter group on 4 generators S_i with relations (S_i)^2 = (S_i S_j)^10 = I.
Terms
- a(0) =1a(1) =4a(2) =12a(3) =36a(4) =108a(5) =324a(6) =972a(7) =2916a(8) =8748a(9) =26244a(10) =78726a(11) =236160a(12) =708432a(13) =2125152a(14) =6375024a(15) =19123776a(16) =57367440a(17) =172090656a(18) =516236976a(19) =1548605952a(20) =4645502958a(21) =13935564252a(22) =41803859076a(23) =125403076764a(24) =376183730628
External references
- oeis: A165756