OFFSET
0,19
COMMENTS
Product_{i=1..m} (1 + x^(4*i-1)) is the Poincaré polynomial for both Sp(2m) and O(2m+1).
REFERENCES
H. Weyl, The Classical Groups, Princeton, 1946, see p. 238.
MATHEMATICA
CoefficientList[Series[Product[1+x^(4i-1), {i, 5}], {x, 0, 60}], x] (* Harvey P. Dale, Mar 09 2019 *)
CROSSREFS
KEYWORD
nonn,fini,full
AUTHOR
N. J. A. Sloane, Aug 29 2010
STATUS
approved