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2, 4, 12, 49, 247, 1482, 10377, 83019, 747171, 7471712, 82188838, 986266063, 12821458831, 179500423635, 2692506354539, 43080101672631, 732361728434739, 13182511111825302, 250467711124680749, 5009354222493614990
(list;
graph;
refs;
listen;
history;
text;
internal format)
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