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1, 3, 10, 35, 127, 467, 1736, 6510, 24591, 93427, 356620, 1366586, 5254256, 20259304, 78309078, 303346956, 1177325247, 4577098533, 17821458618, 69484705346, 271251048911, 1060085370591, 4147198630980, 16239629491179
(list;
graph;
refs;
listen;
history;
text;
internal format)
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