G.f.(t^44+t^43+t^42+t^41+t^40+t^39+t^38+t^37+t^36+t^35+t^34
+t^33+t^32+t^31+t^30+t^29+t^28+t^27+t^26+t^25+t^24+
t^23+t^22+t^21+t^20+t^19+t^18+t^17+t^16+t^15+t^14+
t^13+t^12+t^11+t^10+t^9+t^8+t^7+t^6+t^5+t^4+t^3+
t^2+t+1)/(t^44-2*t^43+t^42-2*t1^41+t^40-2*t ^39+t^38-
2*t^37+t^36-2*t^35+t^34-2*t^33+t^32-2*t=31+t^30-2*t*29+
t^28-2*t^27+t^26-2*t1^25+t^24-2*t ^23+t^22-2*tl^21+t^20-
2*t^19+t^18-2*t^17+t^16-2*t*15+t^14-2*t ^13+t^12-2*t ^11+
t^10-2*t^9+t^8-2*t^7+t^6-2*t ^5+t^4-2*t ^3+t^2-2*t1+1)
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