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1, 15, 140, 995, 5901, 30569, 142375, 607700, 2410081, 8972559, 31608089, 106027825, 340416406, 1050541069, 3127340719, 9007681389, 25168555576, 68374424019, 180958790169, 467385754264, 1179927541924, 2915558734984, 7060185950979
(list;
graph;
refs;
listen;
history;
text;
internal format)
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