OFFSET
0,19
COMMENTS
(Product_{i=1..m-1} (1 + x^(4*i-1))) * (1 + x^(2*m-1)) is the Poincaré polynomial for O(2m).
REFERENCES
H. Weyl, The Classical Groups, Princeton, 1946, see p. 238.
MATHEMATICA
CoefficientList[Series[Product[1 + x^(4 i - 1), {i, 4}]*(1 + x^9), {x, 0, 45}], x] (* Vincenzo Librandi, Mar 14 2013 *)
CROSSREFS
KEYWORD
nonn,fini,full
AUTHOR
N. J. A. Sloane, Aug 29 2010
STATUS
approved