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2, 2, 2, 3, 8, 16, 47, 132, 435, 1445, 5103, 18259, 66934, 247826, 928137, 3500559, 13290552, 50712016, 194358380, 747624825, 2885120934, 11164896416, 43313276948, 168400053019, 656028153120, 2560227845391, 10007858038797, 39178672900385, 153586295761270, 602842558581537, 2368994981198048
(list;
graph;
refs;
listen;
history;
text;
internal format)
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