OFFSET
0,2
LINKS
Dragomir Z. Djokovic, Poincaré series [or Poincare series] of some pure and mixed trace algebras of two generic matrices. See Table 4.
FORMULA
G.f.: f/g where
f = x^32+2*x^31+x^30-2*x^29-x^28+8*x^27+20*x^26+24*x^25+18*x^24+12*x^23+20*x^22+44*x^21+76*x^20+94*x^19+85*x^18+
58*x^17+44*x^16+58*x^15+85*x^14+94*x^13+76*x^12+44*x^11+20*x^10+12*x^9+18*x^8+24*x^7+20*x^6+8*x^5-x^4-2*x^3+x^2+2*x+1,
g = (1-x)^2*(1-x^2)^6*(1-x^3)^8*(1-x^4)^6*(1-x^5)^4.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Dec 21 2006
STATUS
approved