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A091577 Poincare series of the preprojective algebra of a Dynkin diagram of type E_6. 6
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, 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, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

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

REFERENCES

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

LINKS

Table of n, a(n) for n=0..82.

CROSSREFS

Cf. A091571 - A091576.

Sequence in context: A190712 A167200 A077667 * A115036 A133653 A073760

Adjacent sequences:  A091574 A091575 A091576 * A091578 A091579 A091580

KEYWORD

easy,nonn

AUTHOR

Paul Boddington (psb(AT)maths.warwick.ac.uk), Jan 22 2004

STATUS

approved

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Last modified April 19 17:29 EDT 2014. Contains 240767 sequences.