For n>3, a(n) is the number of elements in the Coxeter complex of type D_n (although the sequence starts at n=0. See comments below for precise explanation).
A080254
For n>3, a(n) is the number of elements in the Coxeter complex of type D_n (although the sequence starts at n=0. See comments below for precise explanation).
Terms
- a(0) =1a(1) =1a(2) =9a(3) =75a(4) =865a(5) =12483a(6) =216113a(7) =4364979a(8) =100757313a(9) =2616517443a(10) =75496735057
External references
- oeis: A080254