A091577 - OEIS

%I #7 Jan 30 2018 18:57:37

%S 6,10,14,18,20,20,20,18,14,10,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

%T 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

%U 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0

%N Poincaré series [or Poincare series] of the preprojective algebra of a Dynkin diagram of type E_6.

%C The series is a polynomial because the algebra is finite dimensional. See the entry for A091575 for a general formula.

%D I. Reiten, Dynkin diagrams and the representation theory of algebras, Notices of the AMS, Vol. 44, Number 5.

%Y Cf. A091571, A091572, A091573, A091574, A091575, A091576.

%K easy,nonn

%O 0,1

%A _Paul Boddington_, Jan 22 2004