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G.f.（t^48+2*t^47+2*t ^46+2*t^45+2*t ^44+2*t1^43+2*+
2*t^40+2*t^39+2*t|38+2*t*37+2*t#36+2*t$35+2*t#14+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*t^7+2*t|6+2*t$5+2*t*4+2*t#3+2*t#2+2*t+
1） /（1128*t^48-47*t^47-47*t ^46-47*t1^45-47*t^44-47*t ^43-
47*t^42-47*t^41-47*t ^40-47*t ^39-47*t*t ^38-47*t ^37-47*t1^36-
47*t^35-47*t^34-47*t ^33-47*t-32-47*t1^31-47*t\30-47*t*t^29-
47*t^28-47*t^27-47*t ^26-47*t-25-47*t1^24-47*t\23-47*t/22-
47*t^21-47*t^20-47*t ^19-47*t18-47*t-17-47*t\16-47*t/15-
47*t^14-47*t^13-47*t ^12-47*t ^11-47*t²10-47*t〃9-47*t³8-
47*t^7-47*t^6-47*t^5-47*t ^4-47*t-^3-47*t1^2-47*t\+1）
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