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The series is a polynomial because the algebra is finite dimensional. See the entry for A091575 for a general formula.
I. Reiten, Dynkin diagrams and the representation theory of algebras, Notices of the AMS, Vol. 44, Number 5.
Table of n, a(n) for n=0..82.
Cf. A091571, A091572, A091573, A091574, A091575, A091576.
Sequence in context: A190712 A167200 A077667 * A115036 A133653 A073760
Adjacent sequences: A091574 A091575 A091576 * A091578 A091579 A091580
Paul Boddington, Jan 22 2004