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A203073
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G.f.: (4-4*x-20*x^2)/(1-19*x+2*x^2+78*x^3).
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0
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4, 72, 1340, 25004, 466780, 8714292, 162687676, 3037228420, 56702249852, 1058578651620, 19762686064316, 368951102430308, 6887976439220860, 128592160627319076, 2400696913051056700, 44818794864456212068, 836725520069635027964, 15620892932376170684580, 291627648675580388409788, 5444418948405843506235620
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OFFSET
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0,1
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REFERENCES
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Epstein, David B. A.; Iano-Fletcher, Anthony R.; and Zwick, Uri; Growth functions and automatic groups. Experiment. Math. 5 (1996), no. 4, 297-315.
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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