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^(4i-1), {i, 6}]*(1+x^13), {x, 0, 100}], x] (* Harvey P. Dale, Aug 24 2012 *)
CROSSREFS
KEYWORD
nonn,fini,full
AUTHOR
N. J. A. Sloane, Aug 29 2010
STATUS
approved