Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)^2 = (S_i S_j)^4 = I.
A162925
Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)^2 = (S_i S_j)^4 = I.
Terms
- a(0) =1a(1) =5a(2) =20a(3) =80a(4) =310a(5) =1200a(6) =4650a(7) =18000a(8) =69690a(9) =269820a(10) =1044630a(11) =4044420a(12) =15658470a(13) =60623640a(14) =234711810a(15) =908715240a(16) =3518201250a(17) =13621143060a(18) =52735907790a(19) =204173464860a(20) =790482339630
External references
- oeis: A162925