G.f.(t^50+2*t^49+2*t ^48+2*t ^47+2*t^46+2*t^45+2*t ^44+2*t1^43+
2*t^42+2*t^41+2*t|40+2*t*39+2*t#38+2*t$37+2*t#16+2*t=35+
2*t^34+2*t^33+2*t|32+2*t*31+2*t$30+2*t=29+2*t#28+2*t~27+
2*t^26+2*t^25+2*t*24+2*t|23+2*t`22+2*t` 21+2*t'20+2*t''19+
2*t^18+2*t^17+2*t*16+2*t=15+2*t#14+2*t|13+2*t_12+2*t_11+
2*t^10+2*t^9+2*t ^8+2*t1^7+2*tl^6+2*tr^5+2*t^4+2*t ^3+2*t^2+
2*t+1)/(253*t^50-22*t^49-22*t^48-22*t^47-22*t^46-22*t^45-
22*t^44-22*t^43-22*t ^42-22*t ^41-22*t ^40-22*t ^39-22*t^38-
22*t^37-22*t^36-22*t ^35-22*t ^34-22*t*t ^33-22*t ^32-22*t^31-
22*t^30-22*t^29-22*t ^28-22*t ^27-22*t ^26-22*t^25-22*t ^24-
22*t^23-22*t^22-22*t1^21-22*t ^20-22*t ^19-22*t ^18-22*t^17-
22*t^16-22*t^15-22*t ^14-22*t ^13-22*t ^12-22*t ^11-22*t ^10-
22*t^9-22*t^8-22*t ^7-22*t ^6-22*t ^5-22*t ^4-22*t^3-22*t^2-
22*t+1)